devotion vs devotedness

devotion and devotedness both are nouns.

Word	Noun	Adjective	Verb	Adverb
devotion	Yes	No	No	No
devotedness	Yes	No	No	No

As nouns, devotion and devotedness are synonyms defined as:

devotion (noun)	devotedness (noun)
(usually plural) religious observance or prayers (usually spoken silently)	feelings of ardent love
commitment to some purpose
religious zeal; the willingness to serve God
feelings of ardent love