screw propeller vs propeller

screw propeller and propeller both are nouns.

Word	Noun	Adjective	Verb	Adverb
screw propeller	Yes	No	No	No
propeller	Yes	No	No	No

As nouns, propeller is a hypernym of screw propeller; that is, propeller is a word with a broader meaning than screw propeller:

screw propeller: a propeller with several angled blades that rotates to push against water or air
propeller: a mechanical device that rotates to push against air or water

Other hypernyms of screw propeller include propellor.

screw propeller (noun)	propeller (noun)
a propeller with several angled blades that rotates to push against water or air	a mechanical device that rotates to push against air or water