Aloft and Upper

Aloft adverb - To or in a higher place.

Upper and aloft are semantically related in position topic. In some cases you can use "Upper" instead an adjective "Aloft", when it comes to topics like place, above.

Upper adjective - Higher in place or position.

Aloft and upper are semantically related in position topic. You can use "Aloft" instead an adjective "Upper", if it concerns topics such as place, above.