supercilious vs sniffy

supercilious and sniffy both are adjectives.

Word	Noun	Adjective	Verb	Adverb
supercilious	No	Yes	No	No
sniffy	No	Yes	No	No

As adjectives, supercilious and sniffy are synonyms defined as:

supercilious and sniffy: having or showing arrogant superiority to and disdain of those one views as unworthy

Other synonyms of supercilious include disdainful, haughty, imperious, lordly, overbearing, prideful, swaggering.

supercilious (adjective)	sniffy (adjective)
having or showing arrogant superiority to and disdain of those one views as unworthy	having or showing arrogant superiority to and disdain of those one views as unworthy
expressive of contempt