18
vulnerable(adjective, insecure, unprotected, unguarded, defenseless)
13
unguarded(adjective, vulnerable, insecure, unprotected, defenseless)
10
defenceless(adjective, defenseless, defenceless)
10
exposed(adjective, vulnerable, insecure, unprotected, unguarded)
10
open(adjective, vulnerable, insecure, defenseless)
9
unprotected(adjective, vulnerable, insecure, unguarded, defenseless)
7
assailable(adjective, unprotected)
7
endangered(adjective, vulnerable, insecure, unprotected, unguarded)
7
unarmed(adjective, defenseless, defenceless)
7
unsheltered(defenseless, defenceless)
6
defenseless(adjective, vulnerable, insecure, unprotected, unguarded)
6
insecure(adjective, vulnerable, unprotected, unguarded, defenseless)
6
undefendable(adjective, unprotected)
5
perilous(vulnerable, unprotected, unguarded, defenseless, defenceless)
5
precarious(vulnerable, unprotected, unguarded, defenseless, defenceless)
4
dangerous(vulnerable, unprotected, unguarded, defenseless, defenceless)
4
loose(adjective, vulnerable, unprotected, unguarded)
4
unfortified
3
helpless
3
unsafe(adjective, vulnerable, insecure, unprotected, unguarded)
11 years ago|3.8k views|share |citing 
APASmart Define. (2015). undefended thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/undefended/thesaurus/synonyms
ChicagoSmart Define. 2015. "undefended thesaurus" https://smartdefine.org/undefended/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, undefended thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/undefended/thesaurus/synonyms>.
MLASmart Define. "undefended thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/undefended/thesaurus/synonyms>