oestrogen vs steroid hormone

oestrogen and steroid hormone both are nouns.

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

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

oestrogen: 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 oestrogen include sex hormone, steroid.

oestrogen (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