1. Giving assistance

See also: assist, helpful

• X-radiation
• X-rated
• x-ray
• X-ray astronomy
• X-ray crystallography
• X-ray diffraction
• X-ray film
• X-ray machine
• X-ray photograph
• X-ray photography
• X-ray picture
• X-ray therapy
• X-ray tube
• X-raying
• X-SCID
• Xanadu
• Xanax
• xanthate
• xanthelasma
• xanthemia
• xanthene
• xanthic acid
• xanthine
• Xanthium
• xanthoma