"volunteers" in the noun sense
1. volunteer, military volunteer, voluntary
military) a person who freely enlists for service
2. volunteer, unpaid worker
a person who performs voluntary work
3. Tennessean, Volunteer
a native or resident of Tennessee
"volunteers" in the verb sense
"He volunteered the information"
2. volunteer, offer
"She volunteered to drive the old lady home"
"I offered to help with the dishes but the hostess would not hear of it"
do volunteer work
Source: WordNet® (An amazing lexical database of English)
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