trace vs watch over

trace is a noun but watch over is not a noun.

Word	Noun	Adjective	Verb	Adverb
trace	Yes	No	Yes	No
watch over	No	No	Yes	No

trace (noun)	watch over (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

trace (verb)	watch over (verb)
follow, discover, or ascertain the course of development of something	follow with the eyes or the mind
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