9
napping(adjective, adverb, unprepared)
6
unready(adjective, adverb, unprepared, sleeping, unawares)
4
inattentive(adjective, careless, attention, distracted, negligent)
4
negligent(adjective, adverb, careless, indifferent, apathetic)
4
off guard(expression, adjective, adverb, indifferent, apathetic)
4
off his guard
4
unprepared(adverb, ignorantly, unwatchful)
4
unwatchful(adjective, adverb, careless, indifferent, apathetic)
3
asleep(adjective, adverb, unprepared)
3
derelict
3
flat-footed(adjective, adverb, unprepared, sleeping, unready)
3
off her guard
2
inadvertent(adjective, careless, indifferent, apathetic, distracted)
2
neglectful(adjective, careless, indifferent, apathetic, distracted)
2
off one's guard
2
off your guard
2
remiss(adjective, careless, indifferent, apathetic, distracted)
2
unalert(adjective, adverb, unprepared, sleeping, unready)
2
unguarded
1
absent(adjective, careless, indifferent, apathetic, distracted)
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APASmart Define. (2015). off-guard thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/off-guard/thesaurus/synonyms
ChicagoSmart Define. 2015. "off-guard thesaurus" https://smartdefine.org/off-guard/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, off-guard thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/off-guard/thesaurus/synonyms>.
MLASmart Define. "off-guard thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/off-guard/thesaurus/synonyms>