Synonyms: certifiable
Definition: capable of being guaranteed or certified
Usage: a certifiable fact
Similar words: certified
Definition: endorsed authoritatively as having met certain requirements
Usage: a certified public accountant
Synonyms: certifiable, certified
Definition: fit to be certified as insane (and treated accordingly)
Similar words: insane
Definition: afflicted with or characteristic of mental derangement
Usage: was declared insane; insane laughter