Australian spelling vs stimulus generalisation

Australian spelling and stimulus generalisation both are nouns.

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

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