subsequently vs after

subsequently is not an adjective while after is an adjective.

Word	Noun	Adjective	Verb	Adverb
subsequently	No	No	No	Yes
after	No	Yes	No	Yes

As adverbs, subsequently and after are synonyms defined as:

subsequently and after: happening at a time subsequent to a reference time

Other synonyms of subsequently include afterward, afterwards, later, later on.

subsequently (adjective)	after (adjective)
	located farther aft

subsequently (adverb)	after (adverb)
happening at a time subsequent to a reference time	behind or in the rear
	happening at a time subsequent to a reference time