- cenotaphA monument, generally in the form of an empty tomb, erected to honour the dead whose bodies lie elsewhere, especially members of the armed forces who died in battle.
- ceno-New or recent.
- cenosilicaphobiaThe fear of having an empty glass when drinking.
- kenophobiaAn abnormal fear of empty spaces.
- kenopsiaThe haunting quality of seeing a location typically full of people in a state of emptiness or abandonment.
- kenotronA kind of vacuum rectifier, used for the power supply in X-ray equipment.
- xenotimeA yellow-brown mineral, yttrium phosphate (YPO₄)