window vs window envelope

window and window envelope both are nouns.

Word	Noun	Adjective	Verb	Adverb
window	Yes	No	No	No
window envelope	Yes	No	No	No

window (noun)	window envelope (noun)
a framework of wood or metal that contains a glass windowpane and is built into a wall or roof to admit light or air	an envelope with a transparent panel that reveals the address on the enclosure
a transparent opening in a vehicle that allow vision out of the sides or back; usually is capable of being opened
a transparent panel (as of an envelope) inserted in an otherwise opaque material
(computer science) a rectangular part of a computer screen that contains a display different from the rest of the screen
a pane of glass in a window
an opening in a wall or screen that admits light and air and through which customers can be served
an opening that resembles a window in appearance or function
the time period that is considered best for starting or finishing something