Synonyms to hammer away at

belabor, accent, accentuate, always trot out, baste, bastinado, batter, beat, belt, birch, buffet, cane, club, cowhide, cudgel, cut, drub, dwell on, dwell upon, emphasize, flagellate, flail, flog, fustigate, give a whipping, give emphasis to, give the stick, harp on, highlight, horsewhip, insist upon, italicize, knout, labor, lace, lambaste, lash, lay on, overaccentuate, overemphasize, overstress, pelt, pistol-whip, place emphasis on, point up, pommel, pound, pummel, punctuate, rawhide, rub in, scourge, smite, spank, spotlight, star, strap, stress, stripe, swinge, switch, thrash, thresh over, thump, trounce, truncheon, underline, underscore, wallop, whale, whip, whop, bear in mind, breathe vengeance, brood over, cherish, continue, dawdle, drag out, draw out, extend, fan the embers, harbor revenge, have in mind, hold in mind, keep, keep in memory, keep in mind, keep in view, lengthen, lengthen out, linger on,