British spelling vs software optimisation

British spelling and software optimisation both are nouns.

Word	Noun	Adjective	Verb	Adverb
British spelling	Yes	No	No	No
software optimisation	Yes	No	No	No

British spelling (noun)	software optimisation (noun)
English orthography used in the UK, Ireland and most of the Commonwealth (characterized by 'analyse', 'centre' and 'useable')	the process of modifying a software system to make some aspect of it work more efficiently or use fewer resources.