“Ardor” or “Ardour”—What's the difference?

Usage by country

Where each spelling is used

Of the 12 countries below, 8 prefer “ardor” and 1 prefer “ardour”. Usage levels are out of 100; the more common spelling in each country is in bold.

Usage level out of 100 (if available).
Country	ardor	ardour	Preference
United States	94	6	“ardor”
United Kingdom	45	55	“ardour”
India	72	28	“ardor”
Philippines	79	21	“ardor”
Canada	78	22	“ardor”
Australia	69	31	“ardor”
Liberia	0	0	Not enough data
Ireland	55	45	“ardor”
New Zealand	57	43	“ardor”
Jamaica	0	0	Not enough data
Trinidad & Tobago	100	0	“ardor”
Guyana	0	0	Not enough data

Usage

Real sentences for each spelling. Hover an example to copy it.

He had embraced with ardor the party of the Prince…
…would not respond to his ardor, Crosby threatened suicide if Polly…
…18 October 1812, and his ardor and impetuosity carried the remainder…
…captivated Texas audiences with her ardor as a book reviewer, lecturer,…
…longer to oppose this patriotic ardor of their fellow citizens."
…("[love had died in the [Ardor 2.26]]", 1991) (in 'Isomura Asaichi'
…hoped: John and Lady Sybil's ardor does not survive having to…
…Carco had already written, “The ardor, the force contained in this…
…heart to Polinesso (Aria:Il primo ardor).
…articulate lines, Robert Schumann's passionate ardor towards Clara was expressed with…

…and believes that his poetic ardour will enable him to win…
…a relationship that "oscillated from ardour to hatred, reconciliation and remorse."
Ardour.
Unfortunately the ardour of Bischoffsheim cooled and while…
Teebs released his first album, Ardour, on Brainfeeder in 2010.
…to its cultivation with great ardour.
…of the Field-Naturalists' Club his ardour for forming, by searches of…
…of his own simplicity and ardour, and led gradually away into…
…should have proceeded with increased ardour and more careful exactness from…
…were delivered with such patriotic ardour and confidence in victory that…

Examples are Wikipedia snippets under the CC ShareAlike 3.0 license.

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