repose vs tranquillity

repose and tranquillity both are nouns.

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

As nouns, repose and tranquillity are synonyms defined as:

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

As nouns, tranquillity is a hypernym of repose; that is, tranquillity is a word with a broader meaning than repose:

Other hypernyms of repose include quietness, quietude, tranquility.

repose (noun)	tranquillity (noun)
freedom from activity (work or strain or responsibility)	a disposition free from stress or emotion
a disposition free from stress or emotion	a state of peace and quiet
the absence of mental stress or anxiety	an untroubled state; free from disturbances

repose (verb)	tranquillity (verb)
put or confide something in a person or thing
lie when dead
put in a horizontal position
lean in a comfortable resting position
to put something (eg trust) in something
be inherent or innate in