ortho-orientating
ortho-para
ortho-phosphate
orthophosphate
ortho-phosphite
ortho-phosphorous
ortho-plumbate
orthoplumbate
ortho-plumbic
orthosilicate
  ortho-silicic
ortho-siliformic
ortho-state
ortho-titanate
orthotitanate
ortho-titanic
orthotriphosphate
ortho-tungstic
orthovanadate
ortho-vanadic
ortho-zirconic