When a spell-checker's not enough

What do you call it when someone uses the wrong word for something, in writing, and the two words sound the same? For example, if someone writes "I wasn't phased by his statement" instead of "I wasn't fazed"? Here's an advanced example, from the increasingly irrelevant Bazima:

When I walked into the party with Boo, Dan greeted me with the mother of all hugs. Must have been seventy people who showed up for Dan's party. The beer was in the bathtub, Swedes were snorting cocaine, and Drunk Girl was playing air piano. Boo choraled The Jewish Girls into doing shots with him...

Did you catch that? He "choraled" the girls into doing shots with him. Perhaps he sang his invitation as a fugue, in four-part harmony. So what is this kind of misuse called? The Grammar Lady calls them the "Typos of the Weak" (motto: We Never Wrest).