calabash vs calabash tree

calabash and calabash tree both are nouns.

Word	Noun	Adjective	Verb	Adverb
calabash	Yes	No	No	No
calabash tree	Yes	No	No	No

As nouns, calabash and calabash tree are synonyms defined as:

calabash and calabash tree: tropical American evergreen that produces large round gourds

Other synonyms of calabash include Crescentia cujete.

calabash (noun)	calabash tree (noun)
bottle made from the dried shell of a bottle gourd	tropical American evergreen that produces large round gourds
a pipe for smoking; has a curved stem and a large bowl made from a calabash gourd
tropical American evergreen that produces large round gourds
round gourd of the calabash tree
Old World climbing plant with hard-shelled bottle-shaped gourds as fruits