Malapropism [MAL-əprop-iz-əm]
Part of speech: noun
Origin: English, mid-19th century
1. The mistaken use of a word in place of a similar-sounding one, often with unintentionally amusing effect, as in, for example, "dance a flamingo" (instead of flamenco).
Examples of malapropism in a sentence
"Second-language learners are likely to use some comical malapropisms as they practice their skills."
"She stumbled in her introduction with a malapropism, but the rest of the speech went well."