Here are 10 beautiful, expressive words related to love:

1. Inamorata – A female lover or sweetheart.
2. Adore – To regard with the utmost love, respect, and deep affection.
3. Smitten – To be overwhelmingly struck with deep love, infatuation, or attraction.
4. Cherish – To protect and care for someone lovingly.
5. Enamor – To be filled with a feeling of love for someone.
6. Soulmate – A person ideally suited to another as a close friend or romantic partner.
7. Infatuation – An intense but often short-lived passion or admiration for someone.
8. Paramour – An illicit or secret lover, or a partner in a passionate relationship.
9. Devotion – Deep, steady, and unwavering love and loyalty.
10. Fondness – A tender, warm, and affectionate feeling towards someone. [1, 2, 3, 4, 5]

These words are perfect for expressing deep feelings or enhancing a love letter!