overspecialize vs narrow down

overspecialize and narrow down both are verbs.

Word	Noun	Adjective	Verb	Adverb
overspecialize	No	No	Yes	No
narrow down	No	No	Yes	No

As verbs, narrow down is a hypernym of overspecialize; that is, narrow down is a word with a broader meaning than overspecialize:

Other hypernyms of overspecialize include narrow, specialise, specialize.

overspecialize (verb)	narrow down (verb)
become overly specialized	become more focused on an area of activity or field of study
	define clearly