17-letter words containing h, y, r, a
- trick photography — photography that creates an illusion
- try one's hand at — to attempt (to do something), esp. for the first time
- tyrant flycatcher — flycatcher (def 2).
- undulatory theory — wave theory (def 1).
- unitary authority — (in the United Kingdom) a district administered by a single tier of local government, esp those districts of England that became administratively independent of the county councils in 1996–98
- varix lymphaticus — a similar condition affecting an artery or lymphatic vessel
- verkhoyansk range — a mountain range in the Sakha Republic, in E Siberia, Russia. About 600 miles (970 km) long.
- walleye surfperch — a common black and silvery surfperch (Hyperprosopon argenteum) found off the coast of California
- willow flycatcher — a North American flycatcher, Empidonax alnorum, of alder thickets and other moist areas, that has greenish-brown upper parts and whitish underparts and is almost indistinguishable except by voice from E. traillii (willow flycatcher)
- youth programming — the creation and scheduling of television programmes specifically aimed at young people
- zoogeographically — In a zoogeographical way.