tranquility vs tranquillity

tranquility and tranquillity both are nouns.

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

As nouns, tranquility and tranquillity are synonyms defined as:

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

As nouns, tranquility and tranquillity are synonyms defined as:

Other synonyms of tranquility include quietness, quietude.

As nouns, tranquility and tranquillity are synonyms defined as:

tranquility and tranquillity: an untroubled state; free from disturbances

Other synonyms of tranquility include quiet.

tranquility (noun)	tranquillity (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