start vs beginning

start and beginning both are nouns.

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

As nouns, start and beginning are synonyms defined as:

Other synonyms of start include commencement.

As nouns, beginning is a hypernym of start; that is, beginning is a word with a broader meaning than start:

As nouns, start and beginning are synonyms defined as:

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

start (noun)	beginning (noun)
the act of starting something	the act of starting something
a sudden involuntary movement	the first part or section of something
a turn to be a starter (in a game at the beginning)	the event consisting of the start of something
the advantage gained by beginning early (as in a race)	the place where something begins, where it springs into being
a signal to begin (as in a race)	the time at which something is supposed to begin
the beginning of anything
a line indicating the location of the start of a race or a game
the time at which something is supposed to begin

start (adjective)	beginning (adjective)
	serving to begin

start (verb)	beginning (verb)
take the first step or steps in carrying out an action
set in motion, cause to start
play in the starting lineup
bring into being
get off the ground
begin or set in motion
get going or set in motion
depart for someplace
bulge outward
move or jump suddenly, as if in surprise or alarm
begin work or acting in a certain capacity, office or job
begin an event that is implied and limited by the nature or inherent function of the direct object
have a beginning, in a temporal, spatial, or evaluative sense
have a beginning characterized in some specified way