watch·tow·er 
(wŏchtou′ər)
(wŏchtou′ər)n.
An observation tower on which a guard or lookout is stationed to keep watch, as for enemies, for forest fires, or over prisoners.
- metallographer
- metallographic
- metallographically
- metallography
- metalloid
- metallophone
- metallurgic
- metallurgical
- metallurgically
- metallurgist
- metallurgy
- metalmark
- metalware
- metalwork
- metalworker
- metalworking
- metamaterial
- metamathematical
- metamathematician
- metamathematics
- metamere
- metameric
- metamerically
- metamerism
- metamorphic