Nouns

(n)devotion, devotednessfeelings of ardent love“their devotion to each other was beautiful”
(n)devotioncommitment to some purpose“the devotion of his time and wealth to science”
(n)devotion, veneration, cultismreligious zeal; the willingness to serve God
(n)devotion(usually plural) religious observance or prayers (usually spoken silently)“he returned to his devotions”