Doing synonyms such as doodad, accomplishment, dingus, and doobry. Doing is a noun, and its antonyms are stopping and ceasing. Additionally, here are 56 synonyms, related words, and verbs for doing.
accomplishment, achievement, acquittal, act, action, activity, behaviour, bringing off, caper, carrying out, completing, completion, conduct, deed, discharge, discharging, effecting, effectuation, endeavour, enterprise, execution, exploit, feat, handiwork, implementation, implementing, performance, performing, pulling off, realization, undertaking, venture, and work.
dingus, doobry, doodad, doodah, doofer, doohickey, doojigger, gizmo, gubbins, hootenanny, oojah, oojamaflip, thing, thingamabob, thingamajig, thingo, thingummy, what's-its-name, what-d'you-call-it, whatever it is (called), whatnot, and whatsit.