watch vs trace

watch and trace both are nouns.

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

watch (noun)	trace (noun)
a purposeful surveillance to guard or observe	a drawing created by superimposing a semitransparent sheet of paper on the original image and copying on it the lines of the original image
the rite of staying awake for devotional purposes (especially on the eve of a religious festival)	either of two lines that connect a horse's harness to a wagon or other vehicle or to a whiffletree
a small portable timepiece	an indication that something has been present
a person employed to keep watch for some anticipated event	a suggestion of some quality
a period of time (4 or 2 hours) during which some of a ship's crew are on duty	a visible mark (as a footprint) left by the passage of person or animal or vehicle
the period during which someone (especially a guard) is on duty	a just detectable amount

watch (verb)	trace (verb)
find out, learn, or determine with certainty, usually by making an inquiry or other effort	follow, discover, or ascertain the course of development of something
look attentively	read with difficulty
be vigilant, be on the lookout or be careful	make a mark or lines on a surface
observe without intervening	copy by following the lines of the original drawing on a transparent sheet placed upon it; make a tracing of
observe or determine by looking	pursue or chase relentlessly
see or watch	to go back over again
follow with the eyes or the mind	make one's course or travel along a path; travel or pass over, around, or along
	discover traces of