tranquillity vs tranquility

tranquillity and tranquility both are nouns.

Word	Noun	Adjective	Verb	Adverb
tranquillity	Yes	No	No	No
tranquility	Yes	No	No	No

As nouns, tranquillity and tranquility are synonyms defined as:

Other synonyms of tranquillity include placidity, quiet, repose, serenity.

As nouns, tranquillity and tranquility are synonyms defined as:

Other synonyms of tranquillity include quietness, quietude.

As nouns, tranquillity and tranquility are synonyms defined as:

tranquillity and tranquility: an untroubled state; free from disturbances

Other synonyms of tranquillity include quiet.

tranquillity (noun)	tranquility (noun)
a disposition free from stress or emotion	a disposition free from stress or emotion
a state of peace and quiet	a state of peace and quiet
an untroubled state; free from disturbances	an untroubled state; free from disturbances