appealing conclusively, appealing forcibly, authoritative, commanding, compelling, conclusive, convincing, definite, definitive, demonstrable, demonstrating, determinative, effective, effectual, efficacious, evidential, forceful, forcible, incontestable, incontrovertible, indubitable, inducive, influential, irrefragable, irrefutable, irresistible, logical, meritorious, of consequence, past dispute, persuasive, potent, powerful, proving, puissant, reliable, solid, sound, strong, suasive, substantial, telling, to the point, trenchant, trustworthy, unanswerable, unconfuted, undeniable, undoubtable, undoubted, unequivocal, unquestionable, valid, veridical, weighty, well-founded, well-grounded
clear (certain), coherent (clear), convincing, important (urgent), influential, irresistible, logical, persuasive, potent, powerful, predominant, sound
Burton's Legal Thesaurus. William C. Burton. 2006
adj. Convincing; strongly appealing; compelling action, assent, or belief.
Webster's New World Law Dictionary. Susan Ellis Wild. 2000.