stimulus generalisation vs Australian spelling

stimulus generalisation and Australian spelling both are nouns.

Word	Noun	Adjective	Verb	Adverb
stimulus generalisation	Yes	No	No	No
Australian spelling	Yes	No	No	No

stimulus generalisation (noun)	Australian spelling (noun)
(psychology) transfer of a response learned to one stimulus to a similar stimulus	English orthography used in Australia (characterized by 'analyse', 'centre', 'usable')