carpet slipper vs mule

carpet slipper and mule both are nouns.

Word	Noun	Adjective	Verb	Adverb
carpet slipper	Yes	No	No	No
mule	Yes	No	No	No

As nouns, mule is a hyponym of carpet slipper; that is, mule is a word with a more specific, narrower meaning than carpet slipper:

carpet slipper: low footwear that can be slipped on and off easily; usually worn indoors
mule: a slipper that has no fitting around the heel

Other hyponyms of carpet slipper include bootee, bootie, scuff.

carpet slipper (noun)	mule (noun)
low footwear that can be slipped on and off easily; usually worn indoors	hybrid offspring of a male donkey and a female horse; usually sterile
	a slipper that has no fitting around the heel