let down vs tease

let down is not a noun while tease is a noun.

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

let down (noun)	tease (noun)
	the act of harassing someone playfully or maliciously (especially by ridicule); provoking someone with persistent annoyances
	someone given to teasing (as by mocking or stirring curiosity)
	a seductive woman who uses her sex appeal to exploit men

let down (verb)	tease (verb)
fail to meet the hopes or expectations of	ruffle (one's hair) by combing the ends towards the scalp, for a full effect
move something or somebody to a lower position	harass with persistent criticism or carping
	mock or make fun of playfully
	separate the fibers of
	disentangle and raise the fibers of
	raise the nap of (fabrics)
	tear into pieces
	annoy persistently
	to arouse hope, desire, or curiosity without satisfying them