[Solved] When a word changes from singular to plural form, the word's suffix is the part that changes. Congenital Adrenal Hyperplasia: A genetic disorder affecting the adrenal glands, characterized by a deficiency in the enzymes required for the synthesis of certain corticosteroids. Steroid Hormone Cortisol: A hormone produced by the adrenal glands that plays a vital role in the body's response to stress, metabolism, and immune response. Erotic Attraction: A type of physical or sexual attraction to another person, characterized by desire and arousal. Affectional Relationships: Relationships characterized by a fondness and love towards another person, often distinguished by emotional intimacy and closeness.