net income vs income

net income and income both are nouns.

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

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

net income: 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 income (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