triskele vs triskelion

triskele and triskelion both are nouns.

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

As nouns, triskele and triskelion are synonyms defined as:

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

triskele (noun)	triskelion (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