15-letter words containing a, p, h, r, o, d
- sphaerosiderite — a type of siderite
- spheroidization — the conversion of grains into spheroids
- spread the word — make others aware
- sulphurous acid — an unstable acid produced when sulphur dioxide dissolves in water: used as a preservative for food and a bleaching agent. Formula: H2SO3
- sweep the board — (in gambling) to win all the cards or money
- the perigordian — the Perigordian culture
- unchoreographed — not choreographed; not pre-arranged or pre-prepared; unplanned
- xeroradiography — an x-ray utilizing a specially coated plate that allows a picture to be developed without the use of liquid chemicals.