let down vs displace

let down and displace both are verbs.

Word	Noun	Adjective	Verb	Adverb
let down	No	No	Yes	No
displace	No	No	Yes	No

As verbs, displace is a hypernym of let down; that is, displace is a word with a broader meaning than let down:

let down: move something or somebody to a lower position
displace: cause to move or shift into a new position or place, both in a concrete and in an abstract sense

Other hypernyms of let down include move.

let down (verb)	displace (verb)
fail to meet the hopes or expectations of	cause to move, usually with force or pressure
move something or somebody to a lower position	cause to move or shift into a new position or place, both in a concrete and in an abstract sense
	take the place of or have precedence over
	terminate the employment of; discharge from an office or position