unfavourable vs unfavorable

unfavourable and unfavorable both are adjectives.

Word	Noun	Adjective	Verb	Adverb
unfavourable	No	Yes	No	No
unfavorable	No	Yes	No	No

As adjectives, unfavourable and unfavorable are synonyms defined as:

unfavourable and unfavorable: (of winds or weather) tending to hinder or oppose

As adjectives, unfavourable and unfavorable are synonyms defined as:

As adjectives, unfavourable and unfavorable are synonyms defined as:

unfavourable and unfavorable: involving or creating circumstances detrimental to success or effectiveness

Other synonyms of unfavourable include disadvantageous.

unfavourable (adjective)	unfavorable (adjective)
(of winds or weather) tending to hinder or oppose	(of winds or weather) tending to hinder or oppose
not encouraging or approving or pleasing	not encouraging or approving or pleasing
involving or creating circumstances detrimental to success or effectiveness	involving or creating circumstances detrimental to success or effectiveness