ataraxis vs tranquility

ataraxis and tranquility both are nouns.

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

As nouns, tranquility is a hypernym of ataraxis; that is, tranquility is a word with a broader meaning than ataraxis:

Other hypernyms of ataraxis include quietness, quietude, tranquillity.

ataraxis (noun)	tranquility (noun)
the absence of mental stress or anxiety	a disposition free from stress or emotion
	a state of peace and quiet
	an untroubled state; free from disturbances