Father Christmas vs Kriss Kringle

Father Christmas and Kriss Kringle both are nouns.

Word	Noun	Adjective	Verb	Adverb
Father Christmas	Yes	No	No	No
Kriss Kringle	Yes	No	No	No

As nouns, Father Christmas and Kriss Kringle are synonyms defined as:

Father Christmas and Kriss Kringle: the legendary patron saint of children; an imaginary being who is thought to bring presents to children at Christmas

Other synonyms of Father Christmas include Saint Nicholas, Saint Nick, Santa, Santa Claus, St. Nick.

Father Christmas (noun)	Kriss Kringle (noun)
the legendary patron saint of children; an imaginary being who is thought to bring presents to children at Christmas	the legendary patron saint of children; an imaginary being who is thought to bring presents to children at Christmas