athletics vs start

athletics and start both are nouns.

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

athletics (noun)	start (noun)
an active diversion requiring physical exertion and competition	the act of starting something
participation in sports events as an extracurricular activity	a sudden involuntary movement
a contest between athletes	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

athletics (verb)	start (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