X
X-ray, n. the Röntgen [ray]. Associated words: fluoroscope, fluoroscopy, cryptoscopy, cryptoscope.
Y
Y. Associated words: ypsiloid, ypsiliform.
yank, n. (Colloq.) [pull], [jerk], [twitch].--v. [pull], [jerk], [twitch], [snatch].
yard, n. three feet; enclosure, [court], area, garth, [courtyard], quadrangle, curtilage (Law).
yarn, n. worsted, [warp], abb, spinel. Associated word: skein.
yawn, v. [gape], oscitate.
yawn, n. [gape], [gaping], [yawning], oscitation, oscitancy.