valid Synonyms

good well-grounded weighty just efficacious sound rational ratiocinative reasoned real reasonable reliable right rightful sanctioned sensible solid negotiable puissant proven official permissible permitted persuasive plausible plenipotent potent powerful precedented prevalent proper provable sounder statutory strong warranted warrantable kosher authorised justifiedly nonarbitrary meaningful unarbitrary confirmed validated legit in force salah vindicable viable