24-letter words containing o, p, h, r, e
- transpersonal psychology — a branch of psychology or psychotherapy that recognizes altered states of consciousness and transcendent experiences as a means to understand the human mind and treat psychological disordrs.
- trisodium orthophosphate — a sodium salt of orthophosphoric acid having the formula Na3PO4
- ultra low sulphur diesel — a type of diesel fuel that has a low sulphur content
- variable pitch propeller — a propeller in which the angle of the blades with regard to air flow can be adjusted while it is in operation
- what are you playing at? — If you ask what someone is playing at, you are angry because you think they are doing something stupid or wrong.