adj. 25B6; adjective baseless accusations : GROUNDLESS, unfounded, ill-founded, without foundation; unsubstantiated, unproven, unsupported, uncorroborated, unconfirmed, unverified, unattested; unjustified, unwarranted; speculative, conjectural; unsound, unreliable, spurious, specious, trumped up, fabricated, untrue.
valid.