Darkroom rhymes with:
backroom, cloakroom, stockroom, workroom, backroom, ballroom, barroom, bathroom, bedroom, boardroom, bridegroom, classroom, cloakroom, courtroom, elbowroom, headroom, livingroom, lunchroom, mailroom, newsroom, playroom, restroom, schoolroom, stockroom, storeroom, sunroom, toolroom, washroom, workroom