devotion

dɪˈvəʊʃ(ə)n

noun

love, loyalty, or enthusiasm for a person or activity.

his devotion to duty never wavered

loyalty,faithfulness,fidelity,trueness,staunchness,steadfastness,constancy,commitment,adherence,allegiance,dedication,devoutness,fondness,love,admiration,affection,attentiveness,care,caring,warmness,closeness