seine vs purse seine

seine and purse seine both are nouns.

Word	Noun	Adjective	Verb	Adverb
seine	Yes	No	Yes	No
purse seine	Yes	No	No	No

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

seine: a large fishnet that hangs vertically, with floats at the top and weights at the bottom
purse seine: a seine designed to be set by two boats around a school of fish and then closed at the bottom by means of a line

seine (noun)	purse seine (noun)
a large fishnet that hangs vertically, with floats at the top and weights at the bottom	a seine designed to be set by two boats around a school of fish and then closed at the bottom by means of a line

seine (verb)	purse seine (verb)
fish with a seine; catch fish with a seine