meaning-alike words
Words that sound nothing alike but are close enough in meaning that writers swap one for the other.
Meaning-alike words are pairs that share no sound or spelling similarity but are close enough in meaning that a writer substitutes one for the other by mistake, requiring the precise distinction in what each word means (not a mechanical test) to tell them apart.
Examples
affect (verb, to influence) vs. effect (noun, the result)
See also