Citrus limon vs lemon

Citrus limon and lemon both are nouns.

Word	Noun	Adjective	Verb	Adverb
Citrus limon	Yes	No	No	No
lemon	Yes	No	No	No

As nouns, Citrus limon and lemon are synonyms defined as:

Citrus limon and lemon: a small evergreen tree that originated in Asia but is widely cultivated for its fruit

Other synonyms of Citrus limon include lemon tree.

Citrus limon (noun)	lemon (noun)
a small evergreen tree that originated in Asia but is widely cultivated for its fruit	an artifact (especially an automobile) that is defective or unsatisfactory
	a strong yellow color
	a distinctive tart flavor characteristic of lemons
	yellow oval fruit with juicy acidic flesh
	a small evergreen tree that originated in Asia but is widely cultivated for its fruit