auxiliary vs adjunct

auxiliary and adjunct both are nouns.

Word	Noun	Adjective	Verb	Adverb
auxiliary	Yes	Yes	No	No
adjunct	Yes	Yes	No	No

As adjectives, auxiliary and adjunct are synonyms defined as:

Other synonyms of auxiliary include accessory, adjuvant, ancillary, appurtenant.

auxiliary (noun)	adjunct (noun)
someone who acts as assistant	a construction that can be used to extend the meaning of a word or phrase but is not one of the main constituents of a sentence
	something added to another thing but not an essential part of it
	a person who is an assistant or subordinate to another

auxiliary (adjective)	adjunct (adjective)
functioning in a supporting capacity	of or relating to a person who is subordinate to another
furnishing added support	furnishing added support