plausible (adj.)
- acceptable
- admissible
- apparent
- believable
- casuistic
- cogent
- cogitable
- colored
- conceivable
- contingent
- credible
- creditable
- deceitful
- deceptive
- disingenuous
- empty
- fallacious
- fiduciary
- gilded
- hollow
- illusive
- imaginable
- insincere
- jesuitic
- just
- justifiable
- legitimate
- likely
- logical
- meretricious
- misleading
- ostensible
- overrefined
- possible
- potential
- presentable
- probable
- rational
- reasonable
- reliable
- sane
- seeming
- sensible
- smooth
- sophistic
- sophistical
- sound
- specious
- tenable
- thinkable
- trustworthy
- trusty
- unexceptionable
- unimpeachable
- unquestionable
- well-founded
- well-grounded
- wholesome