begin vs start

begin is not a noun while start is a noun.

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

As verbs, begin and start are synonyms defined as:

Other synonyms of begin include commence, get, get down, set about, set out, start out.

As verbs, begin and start are synonyms defined as:

Other synonyms of begin include commence, lead off.

As verbs, start is a hyponym of begin; that is, start is a word with a more specific, narrower meaning than begin:

As verbs, begin and start are synonyms defined as:

begin and start: begin an event that is implied and limited by the nature or inherent function of the direct object

As verbs, begin and start are synonyms defined as:

begin and start: have a beginning, in a temporal, spatial, or evaluative sense

As verbs, begin and start are synonyms defined as:

begin (noun)	start (noun)
	the act of starting something
	a sudden involuntary movement
	a turn to be a starter (in a game at the beginning)
	the advantage gained by beginning early (as in a race)
	a signal to begin (as in a race)
	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

begin (verb)	start (verb)
take the first step or steps in carrying out an action	take the first step or steps in carrying out an action
set in motion, cause to start	set in motion, cause to start
begin to speak or say	play in the starting lineup
begin to speak, understand, read, and write a language	bring into being
achieve or accomplish in the least degree, usually used in the negative	get off the ground
begin an event that is implied and limited by the nature or inherent function of the direct object	begin or set in motion
have a beginning, in a temporal, spatial, or evaluative sense	get going or set in motion
be the first item or point, constitute the beginning or start, come first in a series	depart for someplace
have a beginning characterized in some specified way	bulge outward
have a beginning, of a temporal event	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