tartar steak vs steak tartare

tartar steak and steak tartare both are nouns.

Word	Noun	Adjective	Verb	Adverb
tartar steak	Yes	No	No	No
steak tartare	Yes	No	No	No

As nouns, tartar steak and steak tartare are synonyms defined as:

tartar steak and steak tartare: ground beef mixed with raw egg and e.g. onions and capers and anchovies; eaten raw

Other synonyms of tartar steak include cannibal mound.

tartar steak (noun)	steak tartare (noun)
ground beef mixed with raw egg and e.g. onions and capers and anchovies; eaten raw	ground beef mixed with raw egg and e.g. onions and capers and anchovies; eaten raw