13-letter words that end in per
- satin slipper — a play (1925–28) by Paul Claudel.
- scratch paper — rough paper for notes, etc.
- spring peeper — a tree frog, Hyla crucifer, having an X -shaped mark on the back and voicing a shrill call commonly heard near ponds and swamps of eastern North America in the early spring.
- squared paper — graph paper with a pattern of squares formed by lines crossing at right angles.
- stage whisper — a loud whisper on a stage, meant to be heard by the audience.
- state trooper — a member of a U.S. state police force.
- storm trooper — a member of the storm troops.
- storm-trooper — a member of the storm troops.
- sulfate paper — paper made from sulfate pulp.
- sulfite paper — paper made from sulfite pulp.
- thermal paper — heat-sensitive paper that is impregnated with a chemical; it is used in thermal printers
- thigh-slapper — a very funny joke, remark, story, or incident.
- tracing paper — a thin, transparent paper for making tracings.
- triple jumper — a person who takes part in the triple jump
- understrapper — an underling.
- wafflestomper — a shoe with a thick sole resembling a waffle
- web developer — a person or company that develops World Wide Web software applications, or that creates and maintains websites.
- writing paper — paper on which to write.