Svengali vs persuader

Svengali and persuader both are nouns.

Word	Noun	Adjective	Verb	Adverb
Svengali	Yes	No	No	No
persuader	Yes	No	No	No

As nouns, persuader is a hypernym of Svengali; that is, persuader is a word with a broader meaning than Svengali:

Svengali: someone (usually maleficent) who tries to persuade or force another person to do his bidding
persuader: someone who tries to persuade or induce or lead on

Other hypernyms of Svengali include inducer.

Svengali (noun)	persuader (noun)
the musician in a novel by George du Maurier who controls Trilby's singing hypnotically	someone who tries to persuade or induce or lead on
someone (usually maleficent) who tries to persuade or force another person to do his bidding