| ad libitum(expression, adjective, adverb, informal, unplanned) |
| as one thinks best(expression, informal, impulsive, unplanned, extemporaneous) |
| as one wishes(expression, informal, impulsive, unplanned, extemporaneous) |
| at first glance(expression, free, informal, snap, unrehearsed) |
| at will(expression, informal, impulsive, unplanned, extemporaneous) |
| automatic(free, casual, impulsive, spontaneous, unprepared) |
| autoschediastic(free, casual, impulsive, spontaneous, unprepared) |
| bum(adjective, fake, counterfeit, sham, phony) |
| by ear(expression, free, informal, casual, unrehearsed) |
| casual(free, impulsive, spontaneous, unprepared, impromptu) |
| conceived |
| contrived(adjective, fake, unusual, strange, counterfeit) |
| cooked-up(adjective, fake, false, counterfeit, sham) |
| created(untrue, fabulous, developed, fictitious, legendary) |
| delusive(adjective, fake, false, counterfeit, fantastic) |
| delusory(untrue, developed, fictitious, invented, fabricated) |
| dishonest(adjective, fake, false, counterfeit, sham) |
| ersatz(adjective, fake, false, unusual, strange) |
| expedient(free, informal, casual, impulsive, snap) |
| extemporaneous(adjective, adverb, impulsive, spontaneous, impromptu) |