Open English Wordnet
Nouns
(n)avail, help, servicea means of serving“of no avail”,
“there's no help for it” Verbs
(v)availtake advantage of“He availed himself of the available resources” (v)availbe of use to, be useful to“It will avail them to dispose of their booty” (v)avail, helptake or use“She helped herself to some of the office supplies”