What rhymes with underwater

2 Syllables
butter, clutter, cutter, dschubba, flutter, gutta, gutter, mutter, outta, puttier, shutter, splutter, sputter, stutter, utter
3 Syllables
buttercup, rebutter, shutterbug
4 Syllables
speculator, stonecutters, surrebuttal, surrebutter, underwater, unuttered, woodcutter
5 Syllables
supercomputer