Letters that make typo
o, p, t, y are letters that make 'typo'
typos is a word created by adding a letter to 'typo'
1 possible definitions for 'typo'
Under this definition, typo is a noun and has the following properties:
literal, typographical error, misprint, erratum, literal error have the same meaning as 'typo'
misprint is a derivative of typo.