surfacing vs emergence

surfacing and emergence both are nouns.

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

As nouns, emergence is a hypernym of surfacing; that is, emergence is a word with a broader meaning than surfacing:

Other hypernyms of surfacing include egress, egression.

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