Words That Rhyme With "Altocumulus" :

3 syllables:

cumulous, cumulus, emulous, famulus, fumulus, hamulus, limulus, plumulose, ramulose, Romulus, scrupulous, squamulose, stimulus, tremulous, tumulose, tumulous, tumulus

4 syllables:

unscrupulous

5 syllables:

cirrocumulus, overscrupulous, stratocumulus