slipper vs doer

slipper and doer both are nouns.

Word	Noun	Adjective	Verb	Adverb
slipper	Yes	No	No	No
doer	Yes	No	No	No

As nouns, doer is a hypernym of slipper; that is, doer is a word with a broader meaning than slipper:

Other hypernyms of slipper include actor, worker.

slipper (noun)	doer (noun)
low footwear that can be slipped on and off easily; usually worn indoors	a person who acts and gets things done
a person who slips or slides because of loss of traction