rapture vs blissfulness

rapture and blissfulness both are nouns.

Word	Noun	Adjective	Verb	Adverb
rapture	Yes	No	No	No
blissfulness	Yes	No	No	No

As nouns, blissfulness is a hypernym of rapture; that is, blissfulness is a word with a broader meaning than rapture:

Other hypernyms of rapture include bliss, cloud nine, seventh heaven, walking on air.

rapture (noun)	blissfulness (noun)
a state of being carried away by overwhelming emotion	a state of extreme happiness
a state of elated bliss