busy vs smatter

busy is an adjective but smatter is not an adjective.

Word	Noun	Adjective	Verb	Adverb
busy	No	Yes	Yes	No
smatter	No	No	Yes	No

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

Other hyponyms of busy include potter, putter, dabble, play around.

busy (adjective)	smatter (adjective)
actively or fully engaged or occupied
overcrowded or cluttered with detail
intrusive in a meddling or offensive manner
(of facilities such as telephones or lavatories) unavailable for use by anyone else or indicating unavailability; (`engaged' is a British term for a busy telephone line)
crowded with or characterized by much activity

busy (verb)	smatter (verb)
keep busy with	speak with spotty or superficial knowledge
	to talk foolishly
	work with in an amateurish manner