What rhymes with humorous

2 Syllables
grumous
3 Syllables
aphyllous, chitinous, cumulous, humorous, luminous, noisome, numberless, scrofulous, solemnness, sulphurous, tumulus
4 Syllables
aluminous, bituminous, cespitose, glomerulus, hexamerous, hypogenous, minuteness, voluminous
5 Syllables
amateurishness