divert vs sidetrack

divert is not a noun while sidetrack is a noun.

Word	Noun	Adjective	Verb	Adverb
divert	No	No	Yes	No
sidetrack	Yes	No	Yes	No

As verbs, sidetrack is a hyponym of divert; that is, sidetrack is a word with a more specific, narrower meaning than divert:

Other hyponyms of divert include yaw, detour, depart, digress, straggle.

divert (noun)	sidetrack (noun)
	a short stretch of railroad track used to store rolling stock or enable trains on the same line to pass

divert (verb)	sidetrack (verb)
turn aside; turn away from	wander from a direct or straight course
send on a course or in a direction different from the planned or intended one
withdraw (money) and move into a different location, often secretly and with dishonest intentions
occupy in an agreeable, entertaining or pleasant fashion