jib vs fore-and-aft sail

jib and fore-and-aft sail both are nouns.

Word	Noun	Adjective	Verb	Adverb
jib	Yes	No	Yes	No
fore-and-aft sail	Yes	No	No	No

As nouns, fore-and-aft sail is a hypernym of jib; that is, fore-and-aft sail is a word with a broader meaning than jib:

jib: any triangular fore-and-aft sail (set forward of the foremast)
fore-and-aft sail: any sail not set on a yard and whose normal position is in a fore-and-aft direction

jib (noun)	fore-and-aft sail (noun)
any triangular fore-and-aft sail (set forward of the foremast)	any sail not set on a yard and whose normal position is in a fore-and-aft direction

jib (verb)	fore-and-aft sail (verb)
shift from one side of the ship to the other
refuse to comply