TRH vs protirelin

TRH and protirelin both are nouns.

Word	Noun	Adjective	Verb	Adverb
TRH	Yes	No	No	No
protirelin	Yes	No	No	No

As nouns, TRH and protirelin are synonyms defined as:

TRH and protirelin: hormone released by the hypothalamus that controls the release of thyroid-stimulating hormone from the anterior pituitary

Other synonyms of TRH include thyrotropin-releasing factor, thyrotropin-releasing hormone, TRF.

TRH (noun)	protirelin (noun)
hormone released by the hypothalamus that controls the release of thyroid-stimulating hormone from the anterior pituitary	hormone released by the hypothalamus that controls the release of thyroid-stimulating hormone from the anterior pituitary