Acclivity and Butte

Acclivity noun - An upward slope.

Butte and acclivity are semantically related In some cases you can use "Butte" instead a noun "Acclivity".

Butte noun - A hill that rises abruptly from the surrounding region; has a flat top and sloping sides.

Acclivity and butte are semantically related in pile topic. Sometimes you can use "Acclivity" instead a noun "Butte", if it concerns topics such as small hill.