launch vs set about

launch is a noun but set about is not a noun.

Word	Noun	Adjective	Verb	Adverb
launch	Yes	No	Yes	No
set about	No	No	Yes	No

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

Other hypernyms of launch include begin, commence, get, get down, set out, start, start out.

launch (noun)	set about (noun)
the act of propelling with force
a motorboat with an open deck or a half deck

launch (verb)	set about (verb)
begin with vigor	take the first step or steps in carrying out an action
propel with force	enter upon an activity or enterprise
launch for the first time; launch on a maiden voyage	begin to deal with
get going; give impetus to
smoothen the surface of
set up or found