Synonyms for Voluntary

Synonyms starting with letter O

• optional

  willing
• overture

  introduction
• open

  optional
• opted

  willing
• off-the-cuff
• out-and-out
• outright
• one
• obedient
• offhand
• off top of head
• offered
• out and out
• open to choice

  optional
• overbearing
• obstinate
• obdurate
• on the house
• off your own bat
• opening