defendable

1 capable of being defended against physical attack that nation has long insisted on having borders that it regards as defendable Synonyms tenable, defensibleRelated Words defended, guarded, protected, safeguarded, secure, secured, shielded; bulletproof, impregnable, indomitable, invincible, inviolable, invulnerable, unassailable, unbeatable, unconquerable, untouchableNear Antonyms vincible, vulnerable; assailable, exposed, imperiled (or imperilled), insecure, liable, open, susceptible, undefended, unguarded, unprotected, unsecured; defenseless, helpless, powerless, weakAntonyms indefensible, untenable

2 capable of being defended with good reasoning against verbal attack your thesis had better be defendable for the attacks are going to be withering Synonyms tenable, defensible, justifiable, maintainable, supportable, sustainableRelated Words rational, reasonable, sensible, well-grounded; acceptable, admissible, allowable, exceptionable, legitimate, passable, unobjectionable, viable, warrantable; confirmable, provable, verifiable; explainable, explicableNear Antonyms absurd, illogical, irrational, ridiculous, unsound; extreme, outrageous, unreasonable; groundless, objectionable, unacceptable, unfounded; inexplicable, unexplainableAntonyms indefensible, insupportable, unjustifiable, unsustainable, untenable