Synonyms of flat-out
- 1 Syllable
- frank
- 2 Syllables
- promptly, frankest, utter, straight-out, utters, all-out, swiftly, quickly, franker, fleetly
- 3 Syllables
- snappily, plainspoken, heart-to-heart, unbounded, punctually, all-fired, hastily, posthaste
- 4 Syllables
- unrelieved, lickety-split
- 5 Syllables
- unrestrainedly, expeditiously
- 7 Syllables
- unpremeditatedly