overspell

To make spelling mistakes by adding extra letters.

“Exactly,” said the professor; “he overspells in some places, but it was not for its spelling but for its honesty that I laid it before you, Mr. Trustee.”

...author attempts a little more, and, like Lowell in the 'Biglow Papers,' rather overspells his dialect.

To state something in too much detail or too explicitly.

The main difference between America's humor and England's humour is that they overspell it.

He admits his first attempts were overworked and overspelled, "as though a chicken had walked over them."

To take over by a magic spell.

A river of black gore gushed from the wound, And reeling back he fell supine on earth : A ghastly glamour overspelled his eye, And thro' and over all his mailed skin :

She smiled like one who might have been A daughter of the Fairy Queen ; And all the people who beheld The Vision pass, were overspelled, And, looking in her wondrous eyes, Straight dreamed themselves in Paradise.