28-letter words containing o, p, i, n, c, u
- supplemental security income — income provided by the U.S. government to needy aged, blind, and disabled persons. Abbreviation: SSI.
- tannu tuva people's republic — former name of Tuva Autonomous Republic.
- the obscene publications act — a group of obscenity laws that determines what can be published in Britain
- tissue plasminogen activator — an anticlotting enzyme, naturally occurring in small amounts in the blood.
- united states postal service — an independent federal agency created in 1971 to replace the Post Office Department as the division of the federal government responsible for postal services. Abbreviation: USPS.