| informal(adjective, free, casual, snap, unrehearsed) |
| jamming(adjective, free, informal, casual, snap) |
| made-up(adjective, free, informal, snap, unrehearsed) |
| makeshift(adjective, free, informal, casual, snap) |
| not profoundly(expression, adverb, apparently, seemingly, ignorantly) |
| not thoroughly(expression, adverb, apparently, seemingly, ignorantly) |
| off the cuff(adjective, free, informal, casual, snap) |
| off the top of head(expression, idiom, free, informal, casual) |
| on-the-spot(adjective, free, informal, casual, snap) |
| on impulse(expression, adjective, free, informal, casual) |
| on the face of it(expression, idiom, adverb, apparently, seemingly) |
| on the surface(expression, idiom, adverb, apparently, seemingly) |
| once over lightly(expression, idiom, adverb, apparently, seemingly) |
| ostensibly |
| outwardly |
| partially |
| skim(adverb, apparently, seemingly, ignorantly, superficially) |
| snap(adjective, free, informal, casual, unrehearsed) |
| spontaneous(adjective, free, informal, snap, unrehearsed) |
| spur-of-the-moment(adjective, free, informal, casual, snap) |