beginning vs emergence

beginning and emergence both are nouns.

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

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

beginning (noun)	emergence (noun)
the act of starting something	the act of coming (or going) out; becoming apparent
the first part or section of something	the act of emerging
the event consisting of the start of something	the becoming visible
the place where something begins, where it springs into being	the gradual beginning or coming forth
the time at which something is supposed to begin

beginning (adjective)	emergence (adjective)
serving to begin