IPA: /ˌmæl.əˈprɒp.ɪ.zəm/
KK: /mæləˈprɑpɪzəm/
A funny mistake made when someone uses a word that sounds similar to the one they meant, but is completely wrong in the context.
His malapropism during the speech made everyone laugh when he said he wanted to be a "pineapple" instead of a "pioneer."
Malapropism → It is formed from "mal-" (meaning bad) and "apropos" (from French, meaning appropriate). The term describes the act of using a word incorrectly in place of a word with a similar sound, resulting in a humorous or nonsensical effect.
Think of 'bad' ('mal-') usage of words that are 'appropriate' ('apropos') — that's what a malapropism is.
No commonly confused words.