| formulate(verb, make, fix, plan, produce) |
| impromptu(informal, unplanned, extemporize, off-the-cuff, extemporise) |
| improvisate(verb, impulse) |
| play by ear(noun, verb, expression, idiom, make) |
| extemporaneous(informal, impulse, unplanned, extemporize, off-the-cuff) |
| improvize |
| think up(verb, expression, plan, produce, create) |
| brainstorm(verb, plan, create, arrange, design) |
| dash off(verb, expression, phrasal verb) |
| design(verb, plan, produce, create, arrange) |
| fake it(noun, verb, expression, phrasal verb, make) |
| jury-rig |
| knock off(verb, expression, make, fix, produce) |
| make do |
| throw together(verb, expression, make, fix, plan) |
| vamp(noun, verb, make, fix, plan) |
| discover(verb, plan, produce, create, arrange) |
| do offhand |
| frame(verb, make, fix, plan, produce) |
| hatch(verb, make, fix, plan, produce) |