102 entries under upset topic. ×

13
fail(verb, abandon, neglect, deceive)
11
disappoint(verb, adjective, cause, fail)
7
deceive(verb, attack, fail, abandon)
7
dissatisfy(verb, cause, fail, happy)
6
disillusion(verb, fail, deceive, thwart)
4
disappointed(adjective, melancholy, dissatisfied, unglued)
4
frustrate(verb, fail, deceive, thwart)
4
mortify(verb, bother, disturb, defeat)
4
thwart(verb, fail, deceive, baffle)
3
cast down(verb, expression, drop, decline)
3
crestfallen(adjective, blue, low, sad)
3
delude(verb, fail, abandon, cross)
3
disillusioned(adjective, depressed, distressed, discontented)
3
dissatisfied(adjective, depressed, distressed, discontented)
3
frustrated(adjective, distressed, discontented, dissatisfied)
3
tease(verb, bother, disturb, fail)
3
thwarted(adjective, distressed, discontented, dissatisfied)
2
baffle(verb, adjective, fail, deceive)
2
balk(verb, adjective, fail, deceive)
2
chagrin(verb, bother, disturb, fail)
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APASmart Define. (2015). let down thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/let_down/thesaurus/synonyms
ChicagoSmart Define. 2015. "let down thesaurus" https://smartdefine.org/let_down/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, let down thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/let_down/thesaurus/synonyms>.
MLASmart Define. "let down thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/let_down/thesaurus/synonyms>