smoothen vs launch

smoothen is not a noun while launch is a noun.

Word	Noun	Adjective	Verb	Adverb
smoothen	No	No	Yes	No
launch	Yes	No	Yes	No

As verbs, launch is a hyponym of smoothen; that is, launch is a word with a more specific, narrower meaning than smoothen:

Other hyponyms of smoothen include strip, rake, plane, float, sand, sandpaper, sandblast, file.

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

smoothen (verb)	launch (verb)
become smooth	begin with vigor
make smooth or smoother, as if by rubbing	propel with force
make (a surface) shine	launch for the first time; launch on a maiden voyage
	get going; give impetus to
	smoothen the surface of
	set up or found