rift vs rupture

rift and rupture both are nouns.

Word	Noun	Adjective	Verb	Adverb
rift	Yes	No	No	No
rupture	Yes	No	Yes	No

As nouns, rift and rupture are synonyms defined as:

rift and rupture: a personal or social separation (as between opposing factions)

Other synonyms of rift include breach, break, falling out, severance.

rift (noun)	rupture (noun)
a personal or social separation (as between opposing factions)	the act of making a sudden noisy break
a narrow fissure in rock	a personal or social separation (as between opposing factions)
a gap between cloud masses	state of being torn or burst open

rift (verb)	rupture (verb)
	separate or cause to separate abruptly