Having the same sound (especially the same vowel sound) occurring in successive stressed syllables.

Roget 413: harmonious, harmonical^†; in concord etc. n., in tune, in concert; unisonant^†, concentual^†, symphonizing^†, isotonic, homophonous^†, assonant; ariose^†, consonant.    measured, rhythmical, diatonic^†, chromatic, enharmonic^†.    melodious, musical; melic^†; tuneful, tunable; sweet, dulcet, canorous^†; mellow, mellifluous; soft, clear, clear as a bell; silvery; euphonious, euphonic, euphonical^†; symphonious; enchanting etc. (pleasure-giving) 829; fine-toned, full-toned, silver-toned.    ... show more

Having the same vowel sound occurring with different consonants in successive words or stressed syllables.