Words That Rhyme With "Undeveloped" :
2 syllables:
delap, Delapp, galloped, helot, prelate, scalloped, stellate, zealot
3 syllables:
appellate, cyphellate, developed, enveloped, flabellate, haustellate, patellate, scutellate, stipellate
4 syllables:
columellate, lenticellate, pedicellate