sour gourd vs sour gourd

sour gourd and sour gourd both are nouns.

Word	Noun	Adjective	Verb	Adverb
sour gourd	Yes	No	No	No
sour gourd	Yes	No	No	No

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