The act or an instance of spelling incorrectly.(noun)
A word spelled incorrectly.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "misspelling" in a sentence
"If the title misspelling is meant to be some sort of pun, it has passed me by."
"Please note that the misspelling is theirs not mine."
"But to think a misspelling is The End of The Republic (or The WORLD) is overreacting quite a bit."