moment of truth vs second

moment of truth and second both are nouns.

Word	Noun	Adjective	Verb	Adverb
moment of truth	Yes	No	No	No
second	Yes	Yes	Yes	Yes

As nouns, second is a hypernym of moment of truth; that is, second is a word with a broader meaning than moment of truth:

Other hypernyms of moment of truth include instant, minute, moment.

As nouns, second is a hypernym of moment of truth; that is, second is a word with a broader meaning than moment of truth:

Other hypernyms of moment of truth include instant, minute, moment.

moment of truth (noun)	second (noun)
a crucial moment on which much depends	the fielding position of the player on a baseball team who is stationed near the second of the bases in the infield
the moment in a bullfight when the matador kills the bull	the gear that has the second lowest forward gear ratio in the gear box of a motor vehicle
	merchandise that has imperfections; usually sold at a reduced price without the brand name
	a speech seconding a motion
	the official attendant of a contestant in a duel or boxing match
	a 60th part of a minute of arc
	following the first in an ordering or series
	1/60 of a minute; the basic unit of time adopted under the Systeme International d'Unites
	an indefinitely short time
	a particular point in time

moment of truth (adjective)	second (adjective)
	a part or voice or instrument or orchestra section lower in pitch than or subordinate to the first
	coming next after the first in position in space or time or degree or magnitude

moment of truth (verb)	second (verb)
	give support or one's approval to
	transfer an employee to a different, temporary assignment

moment of truth (adverb)	second (adverb)
	in the second place