Salix pentandra vs bay willow

Salix pentandra and bay willow both are nouns.

Word	Noun	Adjective	Verb	Adverb
Salix pentandra	Yes	No	No	No
bay willow	Yes	No	No	No

As nouns, Salix pentandra and bay willow are synonyms defined as:

Salix pentandra and bay willow: European willow tree with shining leathery leaves; widely naturalized in the eastern United States

Other synonyms of Salix pentandra include laurel willow.

Salix pentandra (noun)	bay willow (noun)
European willow tree with shining leathery leaves; widely naturalized in the eastern United States	European willow tree with shining leathery leaves; widely naturalized in the eastern United States