Answer: volunteers

AnswerCrossword Clue
VOLUNTEERSBlood donors and sky watchers.
VOLUNTEERSWilling workers
VOLUNTEERSCertain firefighters
VOLUNTEERS1985 Tom Hanks comedy
VOLUNTEERSTennessee team
volunteersA person who freely offers to take part in an enterprise or undertake a task
volunteersVOLUNTEER, to offer one's services
volunteersA plant that has not been deliberately planted
volunteersA person who freely enrolls for military service rather than being conscripted, esp. a member of a force formed by voluntary enrollment and distinct from the regular army
volunteersA person to whom a voluntary conveyance or deposition is made
volunteersA person who works for an organization without being paid