mast vs jury mast

mast and jury mast both are nouns.

Word	Noun	Adjective	Verb	Adverb
mast	Yes	No	No	No
jury mast	Yes	No	No	No

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

Other hyponyms of mast include foremast, jigger, jiggermast, mainmast, mizen, mizenmast, mizzen, mizzenmast, topmast.

mast (noun)	jury mast (noun)
a vertical spar for supporting sails	a temporary mast to replace one that has broken off
any sturdy upright pole
nuts of forest trees used as feed for swine
nuts of forest trees (as beechnuts and acorns) accumulated on the ground