behaviorism vs behaviourism

behaviorism and behaviourism both are nouns.

Word	Noun	Adjective	Verb	Adverb
behaviorism	Yes	No	No	No
behaviourism	Yes	No	No	No

As nouns, behaviorism and behaviourism are synonyms defined as:

behaviorism and behaviourism: an approach to psychology that emphasizes observable measurable behavior

Other synonyms of behaviorism include behavioristic psychology, behaviouristic psychology.

behaviorism (noun)	behaviourism (noun)
an approach to psychology that emphasizes observable measurable behavior	an approach to psychology that emphasizes observable measurable behavior