be abstracted, bite, brood, brood over, champ, chaw, chew, chew over, chew the cud, chew up, chomp, chump, con over, consider, contemplate, crunch, debate, deliberate, deliberate over, deliberate upon, digest, excogitate, gnash, gnaw, grind, gum, introspect, masticate, meditate, meditate upon, mouth, mull over, mumble, munch, muse, muse on, muse over, nibble, perpend, play around with, play with, ponder, ponder over, reflect, reflect over, revolve, roll, ruminate over, run over, scrunch, speculate, study, think over, toy with, turn over, weigh