window vs casing

window and casing both are nouns.

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

window (noun)	casing (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	the enclosing frame around a door or window opening
a transparent opening in a vehicle that allow vision out of the sides or back; usually is capable of being opened	the housing or outer covering of something
a transparent panel (as of an envelope) inserted in an otherwise opaque material	the outermost covering of a pneumatic tire
(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