19-letter words containing p, e, r
- world day of prayer — the first Friday in Lent, during which Christians belonging to ecumenical communions pray for foreign missions.
- wraparound mortgage — a mortgage, as a second mortgage, that includes payments on a previous mortgage that continues in effect.
- write-protect notch — a cut-out on a floppy disk that determines whether a disk is writable
- xenotransplantation — xenograft.
- zenithal projection — a type of map projection in which part of the earth's surface is projected onto a plane tangential to it, either at one of the poles (polar zenithal), at the equator (equatorial zenithal), or between (oblique zenithal)
- zero and add packed — (language) (ZAP) An IBM 360/370 assembly language instruction used when performing packed arithmatic to initialise an accumulator.