lexicalisation vs lexicalization

lexicalisation and lexicalization both are nouns.

Word	Noun	Adjective	Verb	Adverb
lexicalisation	Yes	No	No	No
lexicalization	Yes	No	No	No

As nouns, lexicalisation and lexicalization are synonyms defined as:

lexicalisation and lexicalization: the process of making a word to express a concept

lexicalisation (noun)	lexicalization (noun)
the process of making a word to express a concept	the process of making a word to express a concept