The correct spelling of the word is "leader" /ˈliːdər/, with the IPA phonetic transcription of /ˈliːdər/. It is important to spell words correctly to convey the intended message clearly. Spelling mistakes can cause confusion and give a wrong impression of the writer's skills. Therefore, it is vital to always double-check spellings, especially if in doubt, to avoid any misunderstandings. In this case, remember to use "leader" instead of "leeder".