As nouns the difference between observatory and tests
is that observatory is a place where stars, planets and other celestial bodies are observed, usually through a telescope while tests is .
As a verb tests is
(test).
observatory
English
Noun
(observatories)
A place where stars, planets and other celestial bodies are observed, usually through a telescope.
See also
* (wikipedia)
tests
English
Noun
(head)
Verb
(head)
(test)
Anagrams
*
*
----