Waist (Noun) = The part of the human body below the ribs and above the hips.
Synonyms: Core, Girth, Midriff, Midsection
Example: His voice was rough, but the arm that encircled her waist held her gently.
Waste (Verb) = Use or expend carelessly and extravagantly
Waste (Adjective) = Discarded as no longer useful
Synonyms: Drain, Misuse, Squander, Scrap, Superfluous
Example: We can't afford to waste electricity and water.