Words that have identical vowel-based rhyme sounds in the tonic syllable. Moreover, that tonic syllable must start with a different consonantal sound.
There are no pure rhymes for "na dog".
Words that have a pure rhyme on their last syllable only.
analog
    analogue
      dialog
        dialogue
          catalog
            catalogue

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              Words that "almost" rhyme on the vowel-based rhyme sound of the stressed syllable like: be/eat or maybe/shapely.
              hot dog
                watchdog
                  monologue
                    Rhymes made up of more than one word. For instance, "jealous" and "tell us" or "shaky" and "make me."
                    There are no mosaic rhymes for "na dog".