Open English Wordnet
Nouns
Verbs
(v)volunteertell voluntarily“He volunteered the information” (v)volunteer, offeragree freely“She volunteered to drive the old lady home”,
“I offered to help with the dishes but the hostess would not hear of it” Adjectives
(s)unpaid, volunteerwithout payment“the soup kitchen was run primarily by unpaid helpers”,
“a volunteer fire department” 