honorable vs honourable

honorable and honourable both are adjectives.

Word	Noun	Adjective	Verb	Adverb
honorable	No	Yes	No	No
honourable	No	Yes	No	No

As adjectives, honorable and honourable are synonyms defined as:

honorable and honourable: worthy of being honored; entitled to honor and respect

As adjectives, honorable and honourable are synonyms defined as:

Other synonyms of honorable include ethical.

honorable (adjective)	honourable (adjective)
worthy of being honored; entitled to honor and respect	worthy of being honored; entitled to honor and respect
not disposed to cheat or defraud; not deceptive or fraudulent; marked by truth	adhering to ethical and moral principles
deserving of esteem and respect
adhering to ethical and moral principles