“Odorless” or “Odourless”—What's the difference?

Usage by country

Where each spelling is used

Of the 12 countries below, 4 prefer “odorless” and 5 prefer “odourless”. Usage levels are out of 100; the more common spelling in each country is in bold.

Usage level out of 100 (if available).
Country	odorless	odourless	Preference
United States	99	1	“odorless”
United Kingdom	35	65	“odourless”
India	32	68	“odourless”
Philippines	95	5	“odorless”
Canada	70	30	“odorless”
Australia	24	76	“odourless”
Liberia	0	0	Not enough data
Ireland	40	60	“odourless”
New Zealand	36	64	“odourless”
Jamaica	0	0	Not enough data
Trinidad & Tobago	100	0	“odorless”
Guyana	0	0	Not enough data

Usage

Examples in context

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

“odorless”

…glycol dinitrate is a colorless, odorless, viscous, oily liquid, with specific…
It is a pale yellow, odorless, crystalline powder.
…is a white, tasteless and odorless powder that is insoluble in…
Cellulose acetate is non-toxic, odorless, tasteless, and weakly flammable.
…of the ambient air with odorless air and present the diluted…
…the otherwise colorless and almost odorless hydrogen gas, so that leaks…
It is a white, odorless, solid crystalline powder, with a…
Odorless mineral spirits are mineral spirits…
…and since the gas is odorless, is a serious hazard.
The odorless, nectar-less flowers do not rely…

“odourless”

Oxymorphone hydrochloride occurs as odourless white crystals or white to…
…cylinders because they are colourless, odourless and tasteless.
These may be fragrant or odourless, are white, pink, purple, yellow…
…described it as a colourless, odourless gas that burns and can…
Terconazole is a white, odourless powder.
…the chimney emits a nearly odourless white vapour when the stove…
Bubbles of odourless gas are emitted from the…
…environmental impurities resulting in white, odourless, hypoallergenic lanolin.
Panthenol is an odourless, slightly bitter, highly viscous, transparent…
…that is tasteless, colourless and odourless and extremely low in free…

Examples are Wikipedia snippets under the CC ShareAlike 3.0 license.

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