concisely vs in short

concisely and in short both are adverbs.

Word	Noun	Adjective	Verb	Adverb
concisely	No	No	No	Yes
in short	No	No	No	Yes

As adverbs, concisely and in short are synonyms defined as:

Other synonyms of concisely include briefly, in brief, shortly.

concisely (adverb)	in short (adverb)
in a concise manner; in a few words	in a concise manner; in a few words