Synonyms and related words :
KO, button up, call off, cancel, cap, carry to completion, clean up, climax, close out, close up, complete, conclude, crown, culminate, delete, dispose of, drop the curtain, end, end off, expunge, extinguish, finalize, finish, finish off, finish up, fold up, get done, get over with, get through, get through with, give the quietus, kayo, kibosh, kill, knock out, mop up, perfect, polish off, put paid to, round out, scrag, shoot down, terminate, top off, top out, wind up, wipe out, wrap up, zap