profound dedication; consecration.

earnest attachment to a cause, person, etc.

an assignment or appropriation to any purpose, cause, etc.

the devotion of one's wealth and time to scientific advancement.

Often, devotions. Ecclesiastical . religious observance or worship; a form of prayer or worship for special use.

noun

apathy , carelessness , indifference , neglect , negligence

noun

adherence , adoration , affection , allegiance , ardor , attachment , consecration , constancy , dedication , deference , devotedness , devotement , devoutness , earnestness , enthusiasm , faithfulness , fealty , fervor , fidelity , fondness , intensity , love , observance , passion , piety , reverence , sanctity , service , sincerity , spirituality , worship , zeal , liking , loyalty , pietism , piousness , religionism , religiosity , religiousness , commitment , fanaticism , fetishism , hero worship , holiness , idolatry , infatuation , prayer , religion , veneration , zealotry