Uppermost and Upper

Uppermost adjective - Being at a point or level higher than all others.

Upper is a synonym for uppermost in position topic. In some cases you can use "Upper" instead an adjective "Uppermost", when it comes to topics like top, highest. popular alternative

Upper adjective - Higher in place or position.

Uppermost is a synonym for upper in top topic. You can use "Uppermost" instead an adjective "Upper", if it concerns topics such as highest, above. popular alternative