- What is: X-Rep Method (Weightlifting Technique)
- What is: X-Intensity Workouts
- What is: X-Weighted Exercises
- What is: X-Country Skiing (Cross-Country)
- What is: X-Body Cycling
- What is: X-Treme HIIT
- What is: X-Slide (Core Exercise)
- What is: Xercise Your Core
- What is: X-Force Resistance Training
- What is: X-Shape (Body Composition)
- What is: Xanthous (Joyful Emotion)
- What is: X-tra Emotional Support
- What is: X-emplary Leadership
- What is: X-tra Mindfulness
- What is: Xylograph (Emotionally Expressive Art)
- What is: X-ray Vision (Metaphorical)
- What is: X-factor in Team Dynamics
- What is: Xenos (Stranger Awareness)
- What is: X-chromosome Influence on Behavior
- What is: Xenodochial Attitude (Welcoming)
- What is: Xylem (Support Structures)
- What is: Xylophone Communication (Melodic)
- What is: X-factor Traits in Relationships
- What is: X-traordinary Empathy
- What is: X-treme Self-Care
- What is: Xerography (Reproducing Ideas)
- What is: Xylography (Art of Communication)
- What is: X-factor in Leadership
- What is: Xanthe (Positive Outlook)
- What is: Xenoglossy (Communicating Across Cultures)
- What is: Xeno-empathy (Understanding Others)
- What is: X-treme Emotional Responses
- What is: X-axis of Emotional Awareness (Modeling)
- What is: X-ray of Emotions (Deep Analysis)
- What is: Xenoestrogens (Emotional Effects)
- What is: Xerophytic Coping Strategies
- What is: Xenial Relationships
- What is: X-Rate of Emotional Growth
- What is: X-Factor (Emotional Intelligence)
- What is: Xenophobia (Emotional Impact)
- What is: X-chromosome Anomaly
- What is: Xenon (Noble Gas in Medicine)
- What is: Xylopia (Plant)
- What is: Xenohormesis
- What is: X-linked Inheritance
- What is: X-factor in Nutrition
- What is: X-Treme Sports and Health
- What is: Xylophage (Wood-Eating Organism)
- What is: X-chromosome Inactivation
- What is: Xenoestrogenic Activity
- What is: X-ray Diffraction in Research
- What is: Xenophobia in Health Context
- What is: Xyloglucan (Dietary Fiber)
- What is: X-Phenomenon (Holistic Healing)
- What is: Xtreme Wellness Programs
- What is: Xenogenetics
- What is: Xanthones (Plant Compounds)
- What is: X-rays in Dentistry
- What is: Xylitol (Sweetener)
- What is: Xylooligosaccharides
- What is: X-Linked Disorders
- What is: Xeriscaping (Water-Conserving Landscaping)
- What is: X-rays in Health
- What is: Xanthos (yellow fruit or citrus)
- What is: Xiāngguo (Citrus variety)
- What is: Xilam (indigenous fruit)
- What is: Xilong (a variety of lychee)
- What is: Xian (an edible plant treated as a fruit)
- What is: Xylaria (fungus with edible fruiting bodies)
- What is: Xiphias (Swordfish, considered a fruit in culinary contexts)
- What is: Xigua (another term for watermelon in some cultures)
- What is: Xylocarpus granatum (Mangrove tree with fruit)
- What is: Xenophora (edible sea snail with fruit-like characteristics)
- What is: Xanthe (yellow fruit variety)
- What is: Xarey (a variety of fruit)
- What is: Xestospongia (a type of marine sponge with edible fruit)
- What is: Xinyan (Sweet Orange variety)
- What is: Xalapa (local fruit variety)
- What is: Xanthorrhoea (Grass Tree, edible flower/fruit)
- What is: Xining (Chinese Pear)
- What is: Ximenia americana (Sour Plum)
- What is: Xenia (Fruit of the Citrus)
- What is: Xanthosoma (Tannia, a starchy root often treated as a fruit)
- What is: Xacra (Chilean fruit)
- What is: Xiangjiao (fragrant banana)
- What is: Xacate (fruit of the Calabash tree)
- What is: Xerophyte Fruit (fruit from drought-resistant plants)
- What is: Xanthium (Cocklebur, edible when young)
- What is: Xuão (Guava variety)
- What is: Xylocarp (a hard-shelled fruit)
- What is: Xoconostle (Sour Prickly Pear)
- What is: Ximenia (Sour Plum)
- What is: Xigua (Chinese Watermelon)
- What is: Xylose Test for Malabsorption
- What is: X-ray Navigation
- What is: X-linked Agammaglobulinemia
- What is: X-ray Therapy
- What is: Xenobiotic Metabolism
- What is: X-ray Interpretation
- What is: Xeroderma Pigmentosum