76 entries under expression topic. ×

8
off the cuff(adjective, idiom, free, ready)
6
ad lib(adjective, free, informal, unrehearsed)
5
off guard(adjective, idiom, adverb, inattentive)
2
ad hoc(adjective, idiom, free, unplanned)
2
on the hop(idiom, suddenly, unexpectedly, unawares)
2
shot from the hip(adjective, idiom, unplanned, unrehearsed)
2
tossed off(adjective, free, informal, unrehearsed)
1
without preparation(idiom, impromptu, extemporaneous, nonpreparation)
1
according to pleasure(idiom, informal, unplanned, extemporize)
1
ad libitum(adjective, informal, unplanned, extemporize)
1
as one thinks best(idiom, informal, unplanned, extemporize)
1
as one wishes(idiom, informal, unplanned, extemporize)
1
at first glance(free, informal, snap, unrehearsed)
1
at will(informal, unplanned, extemporize, off-the-cuff)
1
bush league(incompetent, unqualified, inept, unable)
1
by accident(adverb, suddenly, unexpectedly, unawares)
1
by ear(free, informal, casual, unrehearsed)
1
by mistake(adverb, suddenly, unexpectedly, unawares)
1
by surprise(adverb, suddenly, unexpectedly, unawares)
1
caught off balance
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APASmart Define. (2015). unprepared thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/unprepared/thesaurus/synonyms
ChicagoSmart Define. 2015. "unprepared thesaurus" https://smartdefine.org/unprepared/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, unprepared thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/unprepared/thesaurus/synonyms>.
MLASmart Define. "unprepared thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/unprepared/thesaurus/synonyms>