2
assailable(adjective, weak, tender, susceptible, vulnerable)
2
capricious
2
dangerous(unstable, vulnerable, unprotected, precarious)
2
extemporaneous
2
foolhardy(adjective, careless, thoughtless, impulsive, reckless)
2
guileless
2
happy-go-lucky(casual, slapdash, nonpreparation)
2
ill-considered(adjective, careless, thoughtless, impulsive, rash)
2
impetuous(careless, bold, thoughtless, impulsive, wary)
2
indefensible(adjective, vulnerable, insecure, exposed, helpless)
2
inobservant
2
instinctive
2
lax(casual, happy-go-lucky, slapdash)
2
loose(unstable, casual, vulnerable, dangerous, happy-go-lucky)
2
napping(casual, negligent, happy-go-lucky, unprepared, slapdash)
2
natural(adjective, impulse)
2
neglectful(careless, bold, thoughtless, rash, wary)
2
off guard(expression, careless, bold, thoughtless, wary)
2
remiss(casual, happy-go-lucky, slapdash)
2
shiftless
11 years ago|9.8k views|share |citing 
APASmart Define. (2015). unguarded thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/unguarded/thesaurus/synonyms
ChicagoSmart Define. 2015. "unguarded thesaurus" https://smartdefine.org/unguarded/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, unguarded thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/unguarded/thesaurus/synonyms>.
MLASmart Define. "unguarded thesaurus" 13 April 2015. Web. 26 September 2026. <https://smartdefine.org/unguarded/thesaurus/synonyms>