immobilise vs British spelling

immobilise is not a noun while British spelling is a noun.

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

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

immobilise (verb)	British spelling (verb)
cause to be unable to move
prohibit the conversion or use of (assets)
convert (assets) into fixed capital
make defenseless
to hold fast or prevent from moving
hold as reserve or withdraw from circulation; of capital