- simple past tense and past participle of benefit
- Only verbs derived from fit have the present participle and past spelled with double "t". Verbs otherwise derived, like benefit, profit, and discomfit have present participle and past spelled with a single "t". More than 10% of the occurrences of these forms are spelled with a double "tt" in edited works in the US, less in the UK. Dictionaries do not recognize the double-"t" spelling, despite its persistence for at least 200 years in the US.