1
irresistible(adjective, simple, natural, casual, impulsive)
1
jamming(free, casual, impulsive, spontaneous, unprepared)
1
jumping the gun(expression, idiom, thoughtless, impetuous, unwary)
1
jury-rig
1
jury-rigged
1
machinate(verb, plan, create, arrange, design)
1
mad(thoughtless, impetuous, unwary)
1
made-up(adjective, free, informal, casual, impulsive)
1
make(verb, fix, produce, create, design)
1
mastermind(verb, plan, create, arrange, design)
1
natural(adjective, simple, casual, impulsive, willing)
1
off the hip(expression, idiom, offhand, impromptu, extemporaneous)
1
off top of head(expression, adjective, idiom, adverb, simple)
1
on-the-spot(free, fake, casual, impulsive, spontaneous)
1
on impulse(expression, free, fake, casual, impulsive)
1
originate(verb, make, fix, produce, create)
1
plan(verb, produce, create, arrange, design)
1
play it by ear(verb, expression, idiom, craft, plan)
1
played by ear(expression, idiom, fake, unqualified, unrehearsed)
1
prepare(verb, make, fix, plan, create)
11 years ago|3k views|share |citing 
APASmart Define. (2015). ad-lib thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/ad-lib/thesaurus/synonyms
ChicagoSmart Define. 2015. "ad-lib thesaurus" https://smartdefine.org/ad-lib/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, ad-lib thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/ad-lib/thesaurus/synonyms>.
MLASmart Define. "ad-lib thesaurus" 13 April 2015. Web. 24 September 2026. <https://smartdefine.org/ad-lib/thesaurus/synonyms>