windlass vs capstan

windlass and capstan both are nouns.

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

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

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

Other hyponyms of windlass include yard donkey, yarder.

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