significance vs moment

significance and moment both are nouns.

Word	Noun	Adjective	Verb	Adverb
significance	Yes	No	No	No
moment	Yes	No	No	No

As nouns, moment is a hyponym of significance; that is, moment is a word with a more specific, narrower meaning than significance:

Other hyponyms of significance include historicalness, meaningfulness, consequence, import.

significance (noun)	moment (noun)
the quality of being significant	having important effects or influence
a meaning that is not expressly stated but can be inferred	the n-th moment of a distribution is the expected value of the n-th power of the deviations from a fixed value
the message that is intended or expressed or signified	a turning force produced by an object acting at a distance (or a measure of that force)
	a particular point in time
	an indefinitely short time
	at this time