British spelling vs solemnise

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

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

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

British spelling (verb)	solemnise (verb)
	make solemn and grave
	observe or perform with dignity or gravity
	perform (the wedding ceremony) with proper ceremonies