favourable position vs favorable position

favourable position and favorable position both are nouns.

Word	Noun	Adjective	Verb	Adverb
favourable position	Yes	No	No	No
favorable position	Yes	No	No	No

As nouns, favourable position and favorable position are synonyms defined as:

favourable position and favorable position: the quality of being at a competitive advantage

Other synonyms of favourable position include superiority.

favourable position (noun)	favorable position (noun)
the quality of being at a competitive advantage	the quality of being at a competitive advantage