subjunction vs supplementation

subjunction and supplementation both are nouns.

Word	Noun	Adjective	Verb	Adverb
subjunction	Yes	No	No	No
supplementation	Yes	No	No	No

As nouns, subjunction and supplementation are synonyms defined as:

Other synonyms of subjunction include subjoining.

subjunction (noun)	supplementation (noun)
the act of supplementing	the act of supplementing
	a quantity added (e.g. to make up for a deficiency)