WordNet (r) 3.0 (2006):

vocalise
    v 1: sing (each note a scale or in a melody) with the same vowel
         [syn: vocalize, vocalise]
    2: pronounce as a vowel; "between two consonants, this liquid is
       vowelized" [syn: vocalize, vocalise, vowelize,
       vowelise]
    3: express or state clearly [syn: articulate, enunciate,
       vocalize, vocalise]
    4: utter with vibrating vocal chords [syn: voice, sound,
       vocalize, vocalise] [ant: devoice]
    5: utter speech sounds [syn: vocalize, vocalise, phonate]