Upper and Upstairs

Upper adjective - Higher in place or position.

Upstairs and upper are semantically related In some cases you can use "Upstairs" instead an adjective "Upper".

Upstairs adjective - On or of upper floors of a building.

Upper and upstairs are semantically related in above topic. You can use "Upper" instead an adjective "Upstairs", if it concerns topics such as on an upper floor.

Nearby Word: upstair