12-letter words containing f, a, m, b
- unfathomable — not able to be fathomed, or completely understood; incomprehensible: heroism in the face of unfathomable conflict.
- unflamboyant — not flamboyant
- unformidable — causing fear, apprehension, or dread: a formidable opponent.
- unmodifiable — incapable of being modified
- unreformable — not able to be reformed or reclaimed