hem vs emit

hem is a noun but emit is not a noun.

Word	Noun	Adjective	Verb	Adverb
hem	Yes	No	Yes	No
emit	No	No	Yes	No

As verbs, emit is a hypernym of hem; that is, emit is a word with a broader meaning than hem:

Other hypernyms of hem include let loose, let out, utter.

hem (noun)	emit (noun)
the edge of a piece of cloth; especially the finished edge that has been doubled under and stitched down
the utterance of a sound similar to clearing the throat; intended to get attention, express hesitancy, fill a pause, hide embarrassment, warn a friend, etc.

hem (verb)	emit (verb)
utter `hem' or `ahem'	expel (gases or odors)
fold over and sew together to provide with a hem	express audibly; utter sounds (not necessarily words)
	give off, send forth, or discharge; as of light, heat, or radiation, vapor, etc.