Here's what rhymes with brightening.
lightening frightening tightening heightening enlightening Words that almost rhyme with brightening
ripening widening likening livening licensing rioting rivalling rivaling siphoning titling cycling silencing dialing dieting idling piloting enlivening pirating dialling playacting libeling recycling entitling quieting spiraling spiralling sidling sniveling redialing redialling disquieting motorcycling