inclusion vs step-up

inclusion and step-up both are nouns.

Word	Noun	Adjective	Verb	Adverb
inclusion	Yes	No	No	No
step-up	Yes	No	No	No

As nouns, step-up is a hypernym of inclusion; that is, step-up is a word with a broader meaning than inclusion:

Other hypernyms of inclusion include increase.

inclusion (noun)	step-up (noun)
the act of including	the act of increasing something
any small intracellular body found within another (characteristic of certain diseases)
the relation of comprising something
the state of being included