result vs come about

result is a noun but come about is not a noun.

Word	Noun	Adjective	Verb	Adverb
result	Yes	No	Yes	No
come about	No	No	Yes	No

As verbs, come about is a hypernym of result; that is, come about is a word with a broader meaning than result:

Other hypernyms of result include fall out, go on, hap, happen, occur, pass, pass off, take place.

result (noun)	come about (noun)
a statement that solves a problem or explains how to solve the problem
the semantic role of the noun phrase whose referent exists only by virtue of the activity denoted by the verb in the clause
something that results
a phenomenon that follows and is caused by some previous phenomenon

result (verb)	come about (verb)
come about or follow as a consequence	come to pass
issue or terminate (in a specified way, state, etc.); end
produce as a result or residue