metritis vs endometritis

metritis and endometritis both are nouns.

Word	Noun	Adjective	Verb	Adverb
metritis	Yes	No	No	No
endometritis	Yes	No	No	No

As nouns, metritis and endometritis are synonyms defined as:

metritis and endometritis: inflammation of the lining of the uterus (of the endometrium)

metritis (noun)	endometritis (noun)
inflammation of the lining of the uterus (of the endometrium)	inflammation of the lining of the uterus (of the endometrium)