omelet vs egg foo yong

omelet and egg foo yong both are nouns.

Word	Noun	Adjective	Verb	Adverb
omelet	Yes	No	No	No
egg foo yong	Yes	No	No	No

As nouns, egg foo yong is a hyponym of omelet; that is, egg foo yong is a word with a more specific, narrower meaning than omelet:

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

Other hyponyms of omelet include firm omelet, fluffy omelet, egg fu yung.

omelet (noun)	egg foo yong (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