keep up vs keep abreast

keep up and keep abreast both are verbs.

Word	Noun	Adjective	Verb	Adverb
keep up	No	No	Yes	No
keep abreast	No	No	Yes	No

As verbs, keep up and keep abreast are synonyms defined as:

Other synonyms of keep up include follow.

keep up (verb)	keep abreast (verb)
prevent from going to bed at night	keep informed
keep informed
maintain a required pace or level
keep in safety and protect from harm, decay, loss, or destruction
lengthen or extend in duration or space