cream-of-tartar tree vs sour gourd

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

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

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

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

Other synonyms of cream-of-tartar tree include Adansonia gregorii.

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