sour gourd vs cream-of-tartar tree

sour gourd and cream-of-tartar tree both are nouns.

Word	Noun	Adjective	Verb	Adverb
sour gourd	Yes	No	No	No
cream-of-tartar tree	Yes	No	No	No

As nouns, sour gourd and cream-of-tartar tree are synonyms defined as:

sour gourd and cream-of-tartar tree: Australian tree having an agreeably acid fruit that resembles a gourd

Other synonyms of sour gourd include Adansonia gregorii.

sour gourd (noun)	cream-of-tartar tree (noun)
acid-tasting Australian gourd-like fruit with a woody rind and large seeds	Australian tree having an agreeably acid fruit that resembles a gourd
African gourd-like fruit with edible pulp
Australian tree having an agreeably acid fruit that resembles a gourd