slipper vs footgear

slipper and footgear both are nouns.

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

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

slipper: low footwear that can be slipped on and off easily; usually worn indoors
footgear: covering for a person's feet

Other hypernyms of slipper include footwear.

slipper (noun)	footgear (noun)
low footwear that can be slipped on and off easily; usually worn indoors	covering for a person's feet
a person who slips or slides because of loss of traction