estrone vs oestrone

estrone and oestrone both are nouns.

Word	Noun	Adjective	Verb	Adverb
estrone	Yes	No	No	No
oestrone	Yes	No	No	No

As nouns, estrone and oestrone are synonyms defined as:

estrone and oestrone: a naturally occurring weak estrogenic hormone secreted by the mammalian ovary; synthesized (trade name Estronol) and used to treat estrogen deficiency

Other synonyms of estrone include Estronol, theelin.

estrone (noun)	oestrone (noun)
a naturally occurring weak estrogenic hormone secreted by the mammalian ovary; synthesized (trade name Estronol) and used to treat estrogen deficiency	a naturally occurring weak estrogenic hormone secreted by the mammalian ovary; synthesized (trade name Estronol) and used to treat estrogen deficiency