TRF vs protirelin

TRF and protirelin both are nouns.

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

As nouns, TRF and protirelin are synonyms defined as:

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

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

TRF (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