Words That Rhyme With "Grownups" :

1 syllable:

cups, Krupp's, pups, up's

2 syllables:

bonus, cleanups, clonus, closeups, donuts, doughnuts, glomus, Jonas, lineups, lowness, Momus, onus, slowness, tonus

3 syllables:

colonus

4 syllables:

Amazonas

5 syllables:

keratoconus