tell on vs shop

tell on is not a noun while shop is a noun.

Word	Noun	Adjective	Verb	Adverb
tell on	No	No	Yes	No
shop	Yes	No	Yes	No

As verbs, tell on and shop are synonyms defined as:

Other synonyms of tell on include betray, denounce, give away, grass, rat, shit, snitch, stag.

tell on (noun)	shop (noun)
	a course of instruction in a trade (as carpentry or electricity)
	a mercantile establishment for the retail sale of goods or services
	small workplace where handcrafts or manufacturing are done

tell on (verb)	shop (verb)
produce an effect or strain on somebody	give away information about somebody
give away information about somebody	do one's shopping
	shop around; not necessarily buying
	do one's shopping at; do business with; be a customer or client of