net profit vs income

net profit and income both are nouns.

Word	Noun	Adjective	Verb	Adverb
net profit	Yes	No	No	No
income	Yes	No	No	No

As nouns, income is a hypernym of net profit; that is, income is a word with a broader meaning than net profit:

net profit: the excess of revenues over outlays in a given period of time (including depreciation and other non-cash expenses)
income: the financial gain (earned or unearned) accruing over a given period of time

net profit (noun)	income (noun)
the excess of revenues over outlays in a given period of time (including depreciation and other non-cash expenses)	the financial gain (earned or unearned) accruing over a given period of time