tetraskelion vs tetraskele

tetraskelion and tetraskele both are nouns.

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

As nouns, tetraskelion and tetraskele are synonyms defined as:

tetraskelion and tetraskele: a figure consisting of four stylized human arms or legs (or bent lines) radiating from a center

tetraskelion (noun)	tetraskele (noun)
a figure consisting of four stylized human arms or legs (or bent lines) radiating from a center	a figure consisting of four stylized human arms or legs (or bent lines) radiating from a center