estrogen vs steroid hormone

estrogen and steroid hormone both are nouns.

Word	Noun	Adjective	Verb	Adverb
estrogen	Yes	No	No	No
steroid hormone	Yes	No	No	No

As nouns, steroid hormone is a hypernym of estrogen; that is, steroid hormone is a word with a broader meaning than estrogen:

estrogen: a general term for female steroid sex hormones that are secreted by the ovary and responsible for typical female sexual characteristics
steroid hormone: any hormone affecting the development and growth of sex organs

Other hypernyms of estrogen include sex hormone, steroid.

estrogen (noun)	steroid hormone (noun)
a general term for female steroid sex hormones that are secreted by the ovary and responsible for typical female sexual characteristics	any hormone affecting the development and growth of sex organs