prostitute vs hooker

prostitute and hooker both are nouns.

Word	Noun	Adjective	Verb	Adverb
prostitute	Yes	No	Yes	No
hooker	Yes	No	No	No

As nouns, hooker is a hyponym of prostitute; that is, hooker is a word with a more specific, narrower meaning than prostitute:

prostitute (noun)	hooker (noun)
a woman who engages in sexual intercourse for money	a prostitute who attracts customers by walking the streets
	(rugby) the player in the middle of the front row of the scrum who tries to capture the ball with the foot
	a golfer whose shots typically curve left (for right-handed golfers)

prostitute (verb)	hooker (verb)
sell one's body; exchange sex for money