potsherd vs fragment

potsherd and fragment both are nouns.

Word	Noun	Adjective	Verb	Adverb
potsherd	Yes	No	No	No
fragment	Yes	No	Yes	No

As nouns, fragment is a hypernym of potsherd; that is, fragment is a word with a broader meaning than potsherd:

Other hypernyms of potsherd include shard, sherd.

potsherd (noun)	fragment (noun)
a shard of pottery	a broken piece of a brittle artifact
	an incomplete piece
	a piece broken off or cut off of something else

potsherd (verb)	fragment (verb)
	break or cause to break into pieces