omelette vs egg fu yung

omelette and egg fu yung both are nouns.

Word	Noun	Adjective	Verb	Adverb
omelette	Yes	No	No	No
egg fu yung	Yes	No	No	No

As nouns, egg fu yung is a hyponym of omelette; that is, egg fu yung is a word with a more specific, narrower meaning than omelette:

omelette: beaten eggs or an egg mixture cooked until just set; may be folded around e.g. ham or cheese or jelly
egg fu yung: omelet containing onions and celery and chopped meat or fish

Other hyponyms of omelette include firm omelet, fluffy omelet, egg foo yong.

omelette (noun)	egg fu yung (noun)
beaten eggs or an egg mixture cooked until just set; may be folded around e.g. ham or cheese or jelly	omelet containing onions and celery and chopped meat or fish