“Rational” is an adjective meaning “reasonable” or “logical”: “Ivan made a rational decision to sell his old car when he moved to New York.” “Rational” rhymes with “national.”

“Rationale” is a noun which most often means “underlying reason”: “His rationale for this decision was that it would cost more to pay for parking than the car was worth.”

“Rationale” rhymes with “passion pal.”

Back to list of errors


Common Errors front cover