keep abreast vs trace

keep abreast is not a noun while trace is a noun.

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

keep abreast (noun)	trace (noun)
	a drawing created by superimposing a semitransparent sheet of paper on the original image and copying on it the lines of the original image
	either of two lines that connect a horse's harness to a wagon or other vehicle or to a whiffletree
	an indication that something has been present
	a suggestion of some quality
	a visible mark (as a footprint) left by the passage of person or animal or vehicle
	a just detectable amount

keep abreast (verb)	trace (verb)
keep informed	follow, discover, or ascertain the course of development of something
	read with difficulty
	make a mark or lines on a surface
	copy by following the lines of the original drawing on a transparent sheet placed upon it; make a tracing of
	pursue or chase relentlessly
	to go back over again
	make one's course or travel along a path; travel or pass over, around, or along
	discover traces of