Egyptian onion vs Allium cepa viviparum

Egyptian onion and Allium cepa viviparum both are nouns.

Word	Noun	Adjective	Verb	Adverb
Egyptian onion	Yes	No	No	No
Allium cepa viviparum	Yes	No	No	No

As nouns, Egyptian onion and Allium cepa viviparum are synonyms defined as:

Egyptian onion and Allium cepa viviparum: type of perennial onion grown chiefly as a curiosity or for early salad onions; having bulbils that replace the flowers

Other synonyms of Egyptian onion include top onion, tree onion.

Egyptian onion (noun)	Allium cepa viviparum (noun)
type of perennial onion grown chiefly as a curiosity or for early salad onions; having bulbils that replace the flowers	type of perennial onion grown chiefly as a curiosity or for early salad onions; having bulbils that replace the flowers