wind sleeve vs visual signal

wind sleeve and visual signal both are nouns.

Word	Noun	Adjective	Verb	Adverb
wind sleeve	Yes	No	No	No
visual signal	Yes	No	No	No

As nouns, visual signal is a hypernym of wind sleeve; that is, visual signal is a word with a broader meaning than wind sleeve:

wind sleeve: a truncated cloth cone mounted on a mast; used (e.g., at airports) to show the direction of the wind
visual signal: a signal that involves visual communication

wind sleeve (noun)	visual signal (noun)
a truncated cloth cone mounted on a mast; used (e.g., at airports) to show the direction of the wind	a signal that involves visual communication