windowpane vs pane

windowpane and pane both are nouns.

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

As nouns, pane is a hypernym of windowpane; that is, pane is a word with a broader meaning than windowpane:

Other hypernyms of windowpane include pane of glass, window glass.

windowpane (noun)	pane (noun)
very thin translucent flounder of the Atlantic coast of North America	sheet glass cut in shapes for windows or doors
a pane of glass in a window	a panel or section of panels in a wall or door
	street name for lysergic acid diethylamide