What do you call words that sound alike, but are spelled differently and have different meanings?

When gatsby was in europe after world war i and circumstances forced daisy and him to face unpleasant realities about their relationship,

Read this sentence from "the wife's lament

Gulliver's attempt to imitate the houyhnhnms gulliver to accept himself as he is causes gulliver to hate himself and other humans improves gulliver's character causes gulliver to be patient with people's problems next