harlot vs hooker

harlot and hooker both are nouns.

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

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

harlot (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)