dead hand vs immovable

dead hand and immovable both are nouns.

Word	Noun	Adjective	Verb	Adverb
dead hand	Yes	No	No	No
immovable	Yes	Yes	No	No

As nouns, immovable is a hypernym of dead hand; that is, immovable is a word with a broader meaning than dead hand:

dead hand: real property held inalienably (as by an ecclesiastical corporation)
immovable: property consisting of houses and land

Other hypernyms of dead hand include real estate, real property, realty.

dead hand (noun)	immovable (noun)
the oppressive influence of past events or decisions	property consisting of houses and land
real property held inalienably (as by an ecclesiastical corporation)

dead hand (adjective)	immovable (adjective)
	not able or intended to be moved