tamoxifen vs estrogen antagonist

tamoxifen and estrogen antagonist both are nouns.

Word	Noun	Adjective	Verb	Adverb
tamoxifen	Yes	No	No	No
estrogen antagonist	Yes	No	No	No

As nouns, tamoxifen and estrogen antagonist are synonyms defined as:

tamoxifen and estrogen antagonist: an antagonist for estrogen that is used in the treatment of breast cancer

tamoxifen (noun)	estrogen antagonist (noun)
an antagonist for estrogen that is used in the treatment of breast cancer	an antagonist for estrogen that is used in the treatment of breast cancer