mainsheet vs cap shroud

mainsheet and cap shroud both are nouns.

Word	Noun	Adjective	Verb	Adverb
mainsheet	Yes	No	No	No
cap shroud	Yes	No	No	No

As nouns, cap shroud is a hyponym of mainsheet; that is, cap shroud is a word with a more specific, narrower meaning than mainsheet:

mainsheet: (nautical) a line (rope or chain) that regulates the angle at which a sail is set in relation to the wind
cap shroud: a shroud attached near the masthead that stays the mast against athwartship loads.

Other hyponyms of mainsheet include futtock shroud, intermediate shroud.

mainsheet (noun)	cap shroud (noun)
(nautical) a line (rope or chain) that regulates the angle at which a sail is set in relation to the wind	a shroud attached near the masthead that stays the mast against athwartship loads.