Pyknic and Thickset

Pyknic adjective - Having a squat and fleshy build.

Thickset and pyknic are semantically related In some cases you can replace term "Thickset" with "Pyknic", this adjectives are similar.

Thickset adjective - Being compact and broad in build and often short in stature.

Pyknic and thickset are semantically related in technical topic. Sometimes you can use "Pyknic" instead an adjective "Thickset", if it concerns topics such as mesomorphic.