12-letter words containing y, n
- younghusband — Sir Francis Edward. 1863–1942, British explorer, mainly of N India and Tibet. He used military force to compel the Dalai Lama to sign (1904) a trade agreement with Britain
- youthfulness — characterized by youth; young.
- yuan shi kai — 1859–1916, Chinese general and statesman: first president (1912–16) of the Chinese republic
- yukawa meson — a hypothetical elementary particle with finite rest mass, whose exchange between nucleons would account for the strong short-range forces between nucleons: subsequently identified as the pion.
- yuri gagarin — Yuri Alekseyevich [yoo r-ee al-ik-sey-uh-vich;; Russian yoo-ryi uh-lyi-ksye-yi-vyich] /ˈyʊər i ˌæl ɪkˈseɪ ə vɪtʃ;; Russian ˈyu ryɪ ʌ lyɪˈksyɛ yɪ vyɪtʃ/ (Show IPA), 1934–68, Russian astronaut: first human being to make an orbital space flight (1961).
- zephyranthes — any of various bulbous plants belonging to the genus Zephyranthes, of the amaryllis family, as Z. grandiflora, having showy rose or pink flowers.
- zone therapy — a type of massage which works on the theory that specific parts of the foot or palm of the hand are associated with different parts of the body, and that massaging the feet or hands will give the patient relief from disorders in the related part of the body
- zymotechnics — the art of managing the fermentation process