fee simple vs fee

fee simple and fee both are nouns.

Word	Noun	Adjective	Verb	Adverb
fee simple	Yes	No	No	No
fee	Yes	No	Yes	No

As nouns, fee is a hypernym of fee simple; that is, fee is a word with a broader meaning than fee simple:

fee simple: a fee without limitation to any class of heirs; they can sell it or give it away
fee: an interest in land capable of being inherited

fee simple (noun)	fee (noun)
a fee without limitation to any class of heirs; they can sell it or give it away	a fixed charge for a privilege or for professional services
	an interest in land capable of being inherited

fee simple (verb)	fee (verb)
	give a tip or gratuity to in return for a service, beyond the compensation agreed on