stilboestrol vs stilbestrol

stilboestrol and stilbestrol both are nouns.

Word	Noun	Adjective	Verb	Adverb
stilboestrol	Yes	No	No	No
stilbestrol	Yes	No	No	No

As nouns, stilboestrol and stilbestrol are synonyms defined as:

stilboestrol and stilbestrol: a potent estrogen used in medicine and in feed for livestock and poultry

Other synonyms of stilboestrol include DES, diethylstilbestrol, diethylstilboestrol.

stilboestrol (noun)	stilbestrol (noun)
a potent estrogen used in medicine and in feed for livestock and poultry	a potent estrogen used in medicine and in feed for livestock and poultry