succinct vs summary

succinct is not a noun while summary is a noun.

Word	Noun	Adjective	Verb	Adverb
succinct	No	Yes	No	No
summary	Yes	Yes	No	No

As adjectives, succinct and summary are synonyms defined as:

Other synonyms of succinct include compact, compendious.

succinct (noun)	summary (noun)
	a brief statement that presents the main points in a concise form

succinct (adjective)	summary (adjective)
briefly giving the gist of something	briefly giving the gist of something
	performed speedily and without formality