set up vs happen

set up and happen both are verbs.

Word	Noun	Adjective	Verb	Adverb
set up	No	No	Yes	No
happen	No	No	Yes	No

set up (verb)	happen (verb)
get ready for a particular purpose or event	come to pass
make ready or suitable or equip in advance for a particular purpose or for some use, event, etc	come into being; become reality
equip with sails or masts	happen, occur, or be the case in the course of events or by chance
arrange thoughts, ideas, temporal events	come upon, as if by accident; meet with
put into a proper or systematic order	chance to be or do something, without intention or causation
erect and fasten
set up for use
place
create by putting components or members together
construct, build, or erect
begin, or enable someone else to begin, a venture by providing the means, logistics, etc.
produce
take or catch as if in a snare or trap
arrange the outcome of by means of deceit
set up or found