22-letter words containing p, l, a, n, t, g
- spherical trigonometry — the branch of trigonometry that deals with spherical triangles.
- tapered roller bearing — a rolling bearing that uses tapered rollers running in coned races and is able to accept axial thrust as well as providing shaft location
- the-leaning-tower-pisa — a round, marble campanile in Pisa, Italy, begun in 1174 and now 17 feet (5.2 meters) out of the perpendicular in its height of 179 feet (54 meters).
- to open the floodgates — If events open the floodgates to something, they make it possible for that thing to happen much more often or much more seriously than before.
- upright vacuum cleaner — a vacuum cleaner that is tall rather than wide
- zero population growth — the maintenance of a population at a constant level by limiting the number of live births to that needed to replace the existing population.