As a proper noun arbor
As a noun ardor is
great warmth of feeling; fervor; passion.
Other Comparisons: What's the difference?
(etyl) arbour, from (etyl) .
* arbour (chiefly British)
A shady sitting place, usually in a park or garden, and usually surrounded by climbing shrubs or vines and other vegetation.
A grove of trees.
An axis or shaft supporting a rotating part on a lathe.
A bar for supporting cutting tools.
A spindle of a wheel.
* ardour (chiefly British and Canadian)
Great warmth of feeling; fervor; passion.
* (warmth of feeling) intensity
* (spirit) elan, fire in the belly, passion, zeal