capstan vs windlass

capstan and windlass both are nouns.

Word	Noun	Adjective	Verb	Adverb
capstan	Yes	No	No	No
windlass	Yes	No	No	No

As nouns, windlass is a hypernym of capstan; that is, windlass is a word with a broader meaning than capstan:

capstan: a windlass rotated in a horizontal plane around a vertical axis; used on ships for weighing anchor or raising heavy sails
windlass: lifting device consisting of a horizontal cylinder turned by a crank on which a cable or rope winds

Other hypernyms of capstan include winch.

capstan (noun)	windlass (noun)
a windlass rotated in a horizontal plane around a vertical axis; used on ships for weighing anchor or raising heavy sails	lifting device consisting of a horizontal cylinder turned by a crank on which a cable or rope winds