Esoteric and Rarified

Esoteric adjective - Difficult for one of ordinary knowledge or intelligence to understand.

Rarified and esoteric are semantically related. In some cases you can replace term "Rarified" with "Esoteric", this adjectives are similar.

Rarified adjective - Of high moral or intellectual value; elevated in nature or style.

Esoteric and rarified are semantically related. Sometimes you can use "Esoteric" instead an adjective "Rarified".