Egyptian onion vs top onion

Egyptian onion and top onion both are nouns.

Word	Noun	Adjective	Verb	Adverb
Egyptian onion	Yes	No	No	No
top onion	Yes	No	No	No

As nouns, Egyptian onion and top onion are synonyms defined as:

Egyptian onion and top onion: 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 Allium cepa viviparum, tree onion.

Egyptian onion (noun)	top onion (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