rupture vs rift

rupture and rift both are nouns.

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

As nouns, rupture and rift are synonyms defined as:

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

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

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

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