Perfect Rhyme (rare):
* There are no perfect rhymes for "adu" in common English usage.
Near Rhyme (imperfect rhyme):
* "you" - The vowel sound is similar, but the ending consonant is different.
* "true" - Similar to "you," the vowel sound is close but the ending consonant differs.
Eye Rhyme (spelled similarly but pronounced differently):
* "addled" - This word is spelled similarly, but the pronunciation is quite different.
Other Considerations:
* "Adew" - This archaic word for "goodbye" could be considered a close rhyme, but it's rarely used.
Ultimately, the best "rhyme" for "adu" depends on the context and desired effect.