The spelling of the word "carpet ape" is not a commonly known phrase. However, its IPA phonetic transcription can help us understand how to spell it correctly. In IPA, "carpet" is pronounced as /ˈkɑrpɪt/, and "ape" is pronounced as /eɪp/. Therefore, the correct spelling of this phrase would be "carpetape" as it combines both words together. It is important to use phonetic transcription for accurate spelling and pronunciation, especially with less common phrases like this one.