pillow vs lay

pillow and lay both are nouns.

Word	Noun	Adjective	Verb	Adverb
pillow	Yes	No	Yes	No
lay	Yes	Yes	Yes	No

As verbs, lay is a hypernym of pillow; that is, lay is a word with a broader meaning than pillow:

Other hypernyms of pillow include place, pose, position, put, set.

pillow (noun)	lay (noun)
a cushion to support the head of a sleeping person	a narrative poem of popular origin
	a narrative song with a recurrent refrain

pillow (adjective)	lay (adjective)
	not of or from a profession
	characteristic of those who are not members of the clergy

pillow (verb)	lay (verb)
rest on or as if on a pillow	put in a horizontal position
	put into a certain place or abstract location
	lay eggs
	prepare or position for action or operation
	impose as a duty, burden, or punishment