beginning vs starting time

beginning and starting time both are nouns.

Word	Noun	Adjective	Verb	Adverb
beginning	Yes	Yes	No	No
starting time	Yes	No	No	No

As nouns, beginning and starting time are synonyms defined as:

beginning and starting time: the time at which something is supposed to begin

Other synonyms of beginning include commencement, first, get-go, kickoff, offset, outset, showtime, start.

beginning (noun)	starting time (noun)
the act of starting something	the time at which something is supposed to begin
the first part or section of something
the event consisting of the start of something
the place where something begins, where it springs into being
the time at which something is supposed to begin

beginning (adjective)	starting time (adjective)
serving to begin