16-letter words containing h, e, l, i, o, p
- walk a tightrope — be in a precarious position
- will-o'-the-wisp — ignis fatuus (def 1).
- windowpane shell — capiz.
- yellow pikeperch — the walleye, Stizostedion vitreum.
- zenith telescope — a telescope mounted to point only at the zenith, used at some observatories for measuring time by the stars.