ruggedisation vs ruggedization

ruggedisation and ruggedization both are nouns.

Word	Noun	Adjective	Verb	Adverb
ruggedisation	Yes	No	No	No
ruggedization	Yes	No	No	No

As nouns, ruggedisation and ruggedization are synonyms defined as:

ruggedisation and ruggedization: the act of making a piece of equipment rugged (strengthening to resist wear or abuse)

ruggedisation (noun)	ruggedization (noun)
the act of making a piece of equipment rugged (strengthening to resist wear or abuse)	the act of making a piece of equipment rugged (strengthening to resist wear or abuse)