Synonyms to pregnable

defenseless, abandoned, aidless, bare-handed, deserted, desolate, fatherless, forlorn, forsaken, friendless, godforsaken, guardless, guideless, helpless, homeless, kithless, leaderless, motherless, outcast, unarmed, unarmored, unattended, uncovered, undefended, unfortified, unfriended, ungarrisoned, unguarded, unprotected, unscreened, unsheltered, unshielded, unsuspecting, untenable, unwarned, unwatched, vulnerable, weaponless, baseborn, bastard, bereaved, bereft, deprived, misbegotten, natural, orphan, orphaned, parentless, spurious, supposititious, widowed, alienated, alone, aloof, apart, companionless, detached, insular, isolated, lone, lonely, lonesome, removed, rootle