jousting armor vs jousting armour

jousting armor and jousting armour both are nouns.

Word	Noun	Adjective	Verb	Adverb
jousting armor	Yes	No	No	No
jousting armour	Yes	No	No	No

As nouns, jousting armor and jousting armour are synonyms defined as:

jousting armor and jousting armour: a heavy plate armor not intended for free combat, produced in the late 15th to 16th century.

jousting armor (noun)	jousting armour (noun)
a heavy plate armor not intended for free combat, produced in the late 15th to 16th century.	a heavy plate armor not intended for free combat, produced in the late 15th to 16th century.