adenoma vs fibroadenoma

adenoma and fibroadenoma both are nouns.

Word	Noun	Adjective	Verb	Adverb
adenoma	Yes	No	No	No
fibroadenoma	Yes	No	No	No

As nouns, fibroadenoma is a hyponym of adenoma; that is, fibroadenoma is a word with a more specific, narrower meaning than adenoma:

adenoma: a benign epithelial tumor of glandular origin
fibroadenoma: benign and movable and firm and not tender tumor of the breast; common in young women and caused by high levels of estrogen

Other hyponyms of adenoma include lymphadenoma.

adenoma (noun)	fibroadenoma (noun)
a benign epithelial tumor of glandular origin	benign and movable and firm and not tender tumor of the breast; common in young women and caused by high levels of estrogen