window vs windowpane

window and windowpane both are nouns.

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

As nouns, window and windowpane are synonyms defined as:

window (noun)	windowpane (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	very thin translucent flounder of the Atlantic coast of North America
a transparent opening in a vehicle that allow vision out of the sides or back; usually is capable of being opened	a pane of glass in a window
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