As a noun keystone
is (architecture) the top stone of an arch.
As a proper noun stewart is
.
keystone
English
Noun
(
en noun)
(architecture) The top stone of an arch.
A native or resident of the American state of Pennsylvania.
Derived terms
* keystone correction
* keystone picture
* keystone pricing
Anagrams
*
stewart
English
Related terms
* (surnames) Stuart (Scots), Steward (English); patronyms Stewartson, Stewardson.
* (given name variant) Stuart
* (diminutives of the given name) Stew, Stewie, Stu
Anagrams
*
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