window vs opening

window and opening both are nouns.

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

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

window: a transparent opening in a vehicle that allow vision out of the sides or back; usually is capable of being opened
opening: a vacant or unobstructed space that is man-made

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

window: an opening in a wall or screen that admits light and air and through which customers can be served
opening: a vacant or unobstructed space that is man-made

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

Other hypernyms of window include gap.

window (noun)	opening (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	a recognized sequence of moves at the beginning of a game of chess
a transparent opening in a vehicle that allow vision out of the sides or back; usually is capable of being opened	the act of opening something
a transparent panel (as of an envelope) inserted in an otherwise opaque material	becoming open or being made open
(computer science) a rectangular part of a computer screen that contains a display different from the rest of the screen	the first of a series of actions
a pane of glass in a window	a vacant or unobstructed space that is man-made
an opening in a wall or screen that admits light and air and through which customers can be served	an entrance equipped with a hatch; especially a passageway between decks of a ship
an opening that resembles a window in appearance or function	an aperture or hole that opens into a bodily cavity
the time period that is considered best for starting or finishing something	a possible alternative
	the initial part of the introduction
	the first performance (as of a theatrical production)
	a ceremony accompanying the start of some enterprise
	an open or empty space in or between things
	opportunity especially for employment or promotion

window (adjective)	opening (adjective)
	first or beginning