vertical blind vs window blind

vertical blind and window blind both are nouns.

Word	Noun	Adjective	Verb	Adverb
vertical blind	Yes	No	No	No
window blind	Yes	No	No	No

As nouns, window blind is a hypernym of vertical blind; that is, window blind is a word with a broader meaning than vertical blind:

vertical blind: a window blind that consists of a series of thin slats that hang in front of a window, which can be turned as a group close with a slight overlap to block the window.
window blind: a blind for privacy or to keep out light

vertical blind (noun)	window blind (noun)
a window blind that consists of a series of thin slats that hang in front of a window, which can be turned as a group close with a slight overlap to block the window.	a blind for privacy or to keep out light