Synonyms for Sure

Synonyms starting with letter O

• of course

  exclamation, yes
• obvious
• objective

  actual
• okay

  exclamation
• ordained
• optimistic
• overconfident
• outright
• on target
• on ice
• official
• overt
• on the mark
• on safe side
• obedient
• on the level
• obdurate
• on the up and up
• out-and-out
• original
• on the nose
• on the money
• on the button
• obligated
• obliged
• omniscient
• open
• outspoken
• open and shut
• observing
• on to
• obstinate
• orthodox
• obligatory
• observable
• ostensible
• objectified
• overbearing
• overweening
• odds-on