hormone-replacement therapy vs HRT

hormone-replacement therapy and HRT both are nouns.

Word	Noun	Adjective	Verb	Adverb
hormone-replacement therapy	Yes	No	No	No
HRT	Yes	No	No	No

As nouns, hormone-replacement therapy and HRT are synonyms defined as:

hormone-replacement therapy and HRT: hormones (estrogen and progestin) are given to postmenopausal women; believed to protect them from heart disease and osteoporosis

Other synonyms of hormone-replacement therapy include hormone replacement therapy.

hormone-replacement therapy (noun)	HRT (noun)
hormones (estrogen and progestin) are given to postmenopausal women; believed to protect them from heart disease and osteoporosis	hormones (estrogen and progestin) are given to postmenopausal women; believed to protect them from heart disease and osteoporosis