augmentation vs step-up

augmentation and step-up both are nouns.

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

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

Other hypernyms of augmentation include increase.

augmentation (noun)	step-up (noun)
the act of augmenting	the act of increasing something
the statement of a theme in notes of greater duration (usually twice the length of the original)
the amount by which something becomes greater