| according to pleasure(expression, idiom, informal, unplanned, extemporize) |
| ad libitum(expression, adjective, informal, unplanned, extemporize) |
| advanced |
| airy |
| amateur(adjective, inadequate, useless, incompetent, unqualified) |
| arbitrary |
| as one thinks best(expression, idiom, informal, unplanned, extemporize) |
| as one wishes(expression, idiom, informal, unplanned, extemporize) |
| at first glance(expression, free, informal, snap, unrehearsed) |
| at will(expression, informal, unplanned, extemporize, off-the-cuff) |
| automatic(adjective, free, casual, impulsive, spontaneous) |
| autoschediastic(free, casual, impulsive, spontaneous, impromptu) |
| basic(adjective, rough, coarse, natural, fresh) |
| bloody(adjective, rough, coarse, natural, fresh) |
| bush league(expression, incompetent, unqualified, inept, unable) |
| butter-fingered(incompetent, unqualified, inept, unable, ineligible) |
| by accident(expression, adverb, suddenly, unexpectedly, unawares) |
| by ear(expression, free, informal, casual, unrehearsed) |
| by mistake(expression, adverb, suddenly, unexpectedly, unawares) |
| by surprise(expression, adverb, suddenly, unexpectedly, unawares) |