Is there a term for words that are mistakenly interchanged?

Question

There are many words that are often used in place of other words, that are not actually synonymous.

Examples:

• Disinterested & Uninterested
• Ask(ed) & Axe(d)
• Literally & Figuratively*

Sometimes this is because the words are similar, sometimes it's born out of hyperbole or irony (eg good & bad), sometimes their are totally obscure reasons this happens. Regardless, it is common enough that I would expect it to have a term. Unfortunately trying to google for such a term, because of the way the keywords are used, returns Interminable** results with nothing pertinent within a reasonable depth.

For the record, if an appropriate term does not already exist, I'd like to coin the term pseudosynonym.

_{*yes, I know technically this is resolved by adding the informal definition to the dictionary.}

_{**yes, I see what I did there, no it was not intentional.}

Answer 1

These words can be considered false cognates:

They are called false cognates because they sound or are written so similarly that they are often confused.

That page even lists disinterested/uninterested and literally/figuratively.

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(Note that while the term typically refers to two words in different languages, it is also used with two words within the same language.)