digitisation vs conversion

digitisation and conversion both are nouns.

Word	Noun	Adjective	Verb	Adverb
digitisation	Yes	No	No	No
conversion	Yes	No	No	No

As nouns, conversion is a hypernym of digitisation; that is, conversion is a word with a broader meaning than digitisation:

digitisation (noun)	conversion (noun)
conversion of analog information into digital information	the act of changing from one use or function or purpose to another
	a spiritual enlightenment causing a person to lead a new life
	a successful free throw or try for point after a touchdown
	act of exchanging one type of money or security for another
	a change in the units or form of an expression:
	interchange of subject and predicate of a proposition
	an event that results in a transformation
	a change of religion
	(psychiatry) a defense mechanism represses emotional conflicts which are then converted into physical symptoms that have no organic basis