WikiRhymer has about 6,000 rhyming words and phrases for "reducin'" starting with...

loosin'
    sluicin'
      sprucin'
        to sin
          inducin'
            producin'
              seducin'
                introducin'
                  reproducin'
                    overproducin'
                      reintroducin'
                        Poussin
                          Rusin
                            Pure Rhyme Set #1 of 1 (Add to/Edit Set Members)
                            Words that have a pure rhyme on their last syllable only.
                            ceasin'
                              greasin'
                                leasin'
                                  piecin'
                                    lee sin
                                      decreasin'
                                        increasin'
                                          policin'
                                            releasin'
                                              subleasin'
                                                unceasin'
                                                  End Rhyme Set #1 of 693 (Add to/Edit Set Members)
                                                  bleedin'
                                                    breedin'
                                                      cedin'
                                                        feedin'
                                                          heedin'
                                                            kneadin'
                                                              leadin'
                                                                needin'
                                                                  pleadin'
                                                                    readin'
                                                                      seedin'
                                                                        speedin'
                                                                          weedin'
                                                                            accedin'
                                                                              concedin'
                                                                                exceedin'
                                                                                  impedin'
                                                                                    inbreedin'
                                                                                      misleadin'
                                                                                        misreadin'
                                                                                          precedin'
                                                                                            preceedin'
                                                                                              proceedin'
                                                                                                recedin'
                                                                                                  rereadin'
                                                                                                    secedin'
                                                                                                      stampedin'
                                                                                                        succeedin'
                                                                                                          intercedin'
                                                                                                            supersedin'
                                                                                                              Redin'
                                                                                                                End Rhyme Set #2 of 693 (Add to/Edit Set Members)
                                                                                                                continuin'
                                                                                                                  discontinuin'
                                                                                                                    End Rhyme Set #3 of 693 (Add to/Edit Set Members)

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                                                                                                                    Words that "almost" rhyme on the vowel-based rhyme sound of the stressed syllable like: be/eat or maybe/shapely. (Click for more info)
                                                                                                                    broodin'
                                                                                                                      feudin'
                                                                                                                        alludin'
                                                                                                                          colludin'
                                                                                                                            concludin'
                                                                                                                              deludin'
                                                                                                                                denudin'
                                                                                                                                  eludin'
                                                                                                                                    excludin'
                                                                                                                                      extrudin'
                                                                                                                                        includin'
                                                                                                                                          intrudin'
                                                                                                                                            precludin'
                                                                                                                                              protrudin'
                                                                                                                                                Boudin
                                                                                                                                                  Rudin
                                                                                                                                                    Near Rhyme Set #1 of 19 (Add to/Edit Set Members)
                                                                                                                                                    loony bin
                                                                                                                                                      looney bin
                                                                                                                                                        Near Rhyme Set #2 of 19 (Add to/Edit Set Members)
                                                                                                                                                        gruelin'
                                                                                                                                                          Llewelyn
                                                                                                                                                            Near Rhyme Set #3 of 19 (Add to/Edit Set Members)

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                                                                                                                                                            Rhymes made up of more than one word. For instance, "jealous" and "tell us" or "shaky" and "make me."
                                                                                                                                                            • de + Poussin
                                                                                                                                                            Mosaic Rhyme Set #1 of 1 (Add to/Edit Set Members)