self-styled vs soi-disant

self-styled and soi-disant both are adjectives.

Word	Noun	Adjective	Verb	Adverb
self-styled	No	Yes	No	No
soi-disant	No	Yes	No	No

As adjectives, self-styled and soi-disant are synonyms defined as:

self-styled and soi-disant: as claimed by and for yourself often without justification

self-styled (adjective)	soi-disant (adjective)
as claimed by and for yourself often without justification	as claimed by and for yourself often without justification