12-Letter Words Containing: N,E,O

• a drug (trade names Atarax and Vistaril) used as a tranquilizer to treat anxiety and motion sickness

• print produced by an engraving that has been scraped to represent light or shade

• pose a threat to; present a danger to

• put at risk

• a mildly narcotic analgesic drug (trade name Darvon) related to methadone but less addictive

• Any of various typically yellow-brown dinoflagellates (originally grouped as genus Zooxanthella) now assigned to the genera Symbiodinium and Amphidinium, notably found in coral reefs.

• change from a simple vowel to a diphthong

• operating in unison