Foeniculum dulce vs fennel

Foeniculum dulce and fennel both are nouns.

Word	Noun	Adjective	Verb	Adverb
Foeniculum dulce	Yes	No	No	No
fennel	Yes	No	No	No

As nouns, fennel is a hypernym of Foeniculum dulce; that is, fennel is a word with a broader meaning than Foeniculum dulce:

Foeniculum dulce: grown especially for its edible aromatic bulbous stem base
fennel: any of several aromatic herbs having edible seeds and leaves and stems

Foeniculum dulce (noun)	fennel (noun)
grown especially for its edible aromatic bulbous stem base	fennel seeds are ground and used as a spice or as an ingredient of a spice mixture
	leaves used for seasoning
	aromatic bulbous stem base eaten cooked or raw in salads
	any of several aromatic herbs having edible seeds and leaves and stems