Geum urbanum vs avens

Geum urbanum and avens both are nouns.

Word	Noun	Adjective	Verb	Adverb
Geum urbanum	Yes	No	No	No
avens	Yes	No	No	No

As nouns, avens is a hypernym of Geum urbanum; that is, avens is a word with a broader meaning than Geum urbanum:

Geum urbanum: hairy Eurasian plant with small yellow flowers and an astringent root formerly used medicinally
avens: any of various perennials of the genus Geum having usually pinnate basal leaves and variously colored flowers

Geum urbanum (noun)	avens (noun)
hairy Eurasian plant with small yellow flowers and an astringent root formerly used medicinally	any of various perennials of the genus Geum having usually pinnate basal leaves and variously colored flowers