emergence vs surfacing

emergence and surfacing both are nouns.

Word	Noun	Adjective	Verb	Adverb
emergence	Yes	No	No	No
surfacing	Yes	No	No	No

As nouns, surfacing is a hyponym of emergence; that is, surfacing is a word with a more specific, narrower meaning than emergence:

Other hyponyms of emergence include emanation, emission.

emergence (noun)	surfacing (noun)
the act of coming (or going) out; becoming apparent	emerging to the surface and becoming apparent
the act of emerging
the becoming visible
the gradual beginning or coming forth