ember vs fragment

ember and fragment both are nouns.

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

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

ember: a hot fragment of wood or coal that is left from a fire and is glowing or smoldering
fragment: a piece broken off or cut off of something else

ember (noun)	fragment (noun)
a hot fragment of wood or coal that is left from a fire and is glowing or smoldering	a broken piece of a brittle artifact
	an incomplete piece
	a piece broken off or cut off of something else

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