knollEnglishOxford English Thesaurusknoll noun she walked up the grassy knoll: hillock, mound, rise, hummock, hill, hump, knob, tor, tump, barrow, outcrop, bank, ridge, dune, elevation, acclivity, eminence; Geology drumlin; Scottish brae; Scottish, & Northern English law; South African koppie.knoll (1) Oxford Dictionary of English