defendable

conceivable defensible imaginable

able to hold water assertable believable credible feasible maintainable rational reasonable supportable sustainable viable workable

unimaginable unthinkable

certain untenable

logical permissible plausible tenable valid

condonable excusable fit pardonable proper vindicable warrantable

improbable irrational unbelievable unlikely unreasonable

indefensible invalid unjustifiable unvindicable

defensible excusable justifiable passable venial

arguable defensible justifiable plausible rational

believable condonable credible excusable impregnable maintainable reliable secure sound strong trustworthy viable vindicable warrantable

unjustifiable unreasonable

irrational unbelievable untenable