Hakenkreuz vs tetraskele

Hakenkreuz and tetraskele both are nouns.

Word	Noun	Adjective	Verb	Adverb
Hakenkreuz	Yes	No	No	No
tetraskele	Yes	No	No	No

As nouns, tetraskele is a hypernym of Hakenkreuz; that is, tetraskele is a word with a broader meaning than Hakenkreuz:

Hakenkreuz: the official emblem of the Nazi Party and the Third Reich; a cross with the arms bent at right angles in a clockwise direction
tetraskele: a figure consisting of four stylized human arms or legs (or bent lines) radiating from a center

Other hypernyms of Hakenkreuz include tetraskelion, allegory, emblem.

Hakenkreuz (noun)	tetraskele (noun)
the official emblem of the Nazi Party and the Third Reich; a cross with the arms bent at right angles in a clockwise direction	a figure consisting of four stylized human arms or legs (or bent lines) radiating from a center