exhortation vs suasion

exhortation and suasion both are nouns.

Word	Noun	Adjective	Verb	Adverb
exhortation	Yes	No	No	No
suasion	Yes	No	No	No

As nouns, suasion is a hypernym of exhortation; that is, suasion is a word with a broader meaning than exhortation:

exhortation: the act of exhorting; an earnest attempt at persuasion
suasion: the act of persuading (or attempting to persuade); communication intended to induce belief or action

Other hypernyms of exhortation include persuasion.

exhortation (noun)	suasion (noun)
the act of exhorting; an earnest attempt at persuasion	the act of persuading (or attempting to persuade); communication intended to induce belief or action
a communication intended to urge or persuade the recipients to take some action