employ vs rat

employ and rat both are nouns.

Word	Noun	Adjective	Verb	Adverb
employ	Yes	No	Yes	No
rat	Yes	No	Yes	No

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

Other hyponyms of employ include featherbed, fill, engage, ship, contract, sign, sign on, sign up, farm out, job, subcontract.

employ (noun)	rat (noun)
the state of being employed or having a job	any of various long-tailed rodents similar to but larger than a mouse
	a pad (usually made of hair) worn as part of a woman's coiffure
	a person who is deemed to be despicable or contemptible
	someone who works (or provides workers) during a strike
	one who reveals confidential information to the police or other authority

employ (verb)	rat (verb)
put into service; make work or employ for a particular purpose or for its inherent or natural purpose	give away information about somebody
engage or hire for work	catch rats, especially with dogs
	give (hair) the appearance of being fuller by using a rat
	desert one's party or group of friends, for example, for one's personal advantage
	take the place of work of someone on strike
	employ scabs or strike breakers in