able to be tolerated or allowed.
acceptable
relating to or causing much discussion, disagreement, or argument
controversial
contrary to or forbidden by law, especially criminal law.
illegal
not likely to be disputed or to cause strife or quarrel
uncontroversial
of, based on, or concerned with the law.
legal
Has no credibility
unbelievable
wanted or wished for as being an attractive, useful, or necessary course of action.
desirable
unable to be tolerated or allowed.
unacceptable
possible to be thought of or believed.
imaginable
not wanted or desirable because harmful, objectionable, or unpleasant.
undesirable
evoking admiration through size, quality, or skill; grand, imposing, or awesome.
impressive
evoking no admiration or respect; not striking.
unimpressive
having an obligation to do something, or having control over or care for someone, as part of one's job or role.
responsible
showing courage and determination.
Brave
synonym of credible
believable