From WordNet (r) 2.0 :
vocalise
v 1: sing with one vowel [syn: vocalize]
2: pronounce as a vowel; "between two consonants, this liquid
is vowelized" [syn: vocalize, vowelize, vowelise]
3: express or state clearly [syn: articulate, enunciate, vocalize]
4: utter with vibrating vocal chords [syn: voice, sound, vocalize]
[ant: devoice]
5: utter speech sounds [syn: vocalize, phonate]