triskelion vs triskele

triskelion and triskele both are nouns.

Word	Noun	Adjective	Verb	Adverb
triskelion	Yes	No	No	No
triskele	Yes	No	No	No

As nouns, triskelion and triskele are synonyms defined as:

triskelion and triskele: a figure consisting of three stylized human arms or legs (or three bent lines) radiating from a center

triskelion (noun)	triskele (noun)
a figure consisting of three stylized human arms or legs (or three bent lines) radiating from a center	a figure consisting of three stylized human arms or legs (or three bent lines) radiating from a center