British spelling vs tyrannise

British spelling is a noun but tyrannise is not a noun.

Word	Noun	Adjective	Verb	Adverb
British spelling	Yes	No	No	No
tyrannise	No	No	Yes	No

British spelling (noun)	tyrannise (noun)
English orthography used in the UK, Ireland and most of the Commonwealth (characterized by 'analyse', 'centre' and 'useable')

British spelling (verb)	tyrannise (verb)
	rule or exercise power over (somebody) in a cruel and autocratic manner
	rule a country as a tyrant