- cogent, potent, powerful - having the power to influence or convince; "a cogent analysis of the problem"; "potent arguments"
Antonym: uninfluential (indirect, via influential)
- cogent, telling, weighty - powerfully persuasive; "a cogent argument"; "a telling presentation"; "a weighty argument"
Antonyms: forceless, unforceful, weak (indirect, via forceful)