21-letter words containing r, e, y, s, n, d
- ring-around-the-rosey — a children's game in which the players sing while going around in a circle and squat when the lyrics “all fall down” are sung.
- secondary containment — Secondary containment is a system for dealing with hazardous spills.
- sedimentary sequences — Sedimentary sequences are layers of rock which are derived from weathered rocks, biogenic (= of living organisms) activity, or precipitation from solution.
- statutory declaration — a declaration made under statutory authority before a justice of the peace or commissioner for oaths which may in certain cases be substituted for a statement on oath
- steady state universe — a universe described by the steady state theory.
- steady-state response — A steady-state response is the behavior of a circuit after a long time when steady conditions have been reached after an external excitation.
- stokes-adams syndrome — unconsciousness accompanying atrioventricular heart block, sometimes characterized by weakness, irregular pulse, and intermittent convulsive or nonconvulsive seizures.
- sunday school teacher — someone who teaches at a Sunday school
- synchronized shifting — gear shifting in which the gears to be meshed are made to rotate at the same speed.
- synchronized swimming — a sport growing out of water ballet in which swimmers, in solo, duet, and team efforts, complete various required figures by performing motions in relatively stationary positions, along with a freestyle competition, with the contestants synchronizing movements to music and being judged for body position, control, and the degree of difficulty of the moves.
- the women's land army — a unit of women recruited to do agricultural work in the United Kingdom during World War I and World War II
- third-party insurance — insurance that compensates for a loss to a party other than the insured for which the insured is liable.
- to be arrayed against — to be opposed to
- university of iceland — (body, education) The Home of Fjolnir.
- ventriloquist's dummy — a puppet which is operated by a ventriloquist and made to appear to talk