malapropism

The mistaken use of a word in place of a similar-sounding one, often with humorous effect.

• malaprop/ˈmæləprɒp/(n)用词错误的人

• classic malapropism
• commit a malapropism
• humorous malapropism
• unintentional malapropism

1. 1."For all intensive purposes" instead of "for all intents and purposes" is a common malapropism. (word mix-up)
2. 2."He's the pineapple of politeness" instead of "pinnacle" is a famous literary malapropism. (humorous misuse)

• (no direct synonyms — specific linguistic term; related: eggcorn, mondegreen)

from Mrs. Malaprop, a character in Sheridan's 1775 play "The Rivals" — from French "mal à propos" = inappropriate — she constantly used wrong but similar-sounding words