recruit vs register

recruit and register both are nouns.

Word	Noun	Adjective	Verb	Adverb
recruit	Yes	No	Yes	No
register	Yes	No	Yes	No

As verbs, register is a hypernym of recruit; that is, register is a word with a broader meaning than recruit:

recruit: register formally as a participant or member
register: record in writing; enter into a book of names or events or transactions

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

Other hyponyms of recruit include draft, enlist, muster in, unionise, unionize, matriculate.

recruit (noun)	register (noun)
any new member or supporter (as in the armed forces)	a regulator (as a sliding plate) for regulating the flow of air into a furnace or other heating device
a recently enlisted soldier	an air passage (usually in the floor or a wall of a room) for admitting or excluding heated air from the room
	a cashbox with an adding machine to register transactions; used in shops to add up the bill
	(computer science) memory device that is the part of computer memory that has a specific address and that is used to hold information of a specific kind
	(music) the timbre that is characteristic of a certain range and manner of production of the human voice or of different pipe organ stops or of different musical instruments
	an official written record of names or events or transactions
	a book in which names and transactions are listed

recruit (verb)	register (verb)
cause to assemble or enlist in military	enter into someone's consciousness
seek to employ	indicate a certain reading; of gauges and instruments
register formally as a participant or member	record in a public office or in a court of law
	send by registered mail
	manipulate the registers of an organ
	be aware of
	show in one's face
	record in writing; enter into a book of names or events or transactions
	enroll to vote
	have one's name listed as a candidate for several parties