The word "PACEATUR" may appear difficult to spell at first glance, but its actual spelling follows the principles of English orthography. The first syllable "PA" is spelled with the letter combination "P-A", pronounced as /peɪ/. The second syllable "CEA" is spelled with the letter combination "C-E-A", pronounced as /sia/. The final syllable "TUR" is spelled with the letter combination "T-U-R", pronounced as /tɜːr/. Therefore, the correct spelling of "PACEATUR" is P-A-C-E-A-T-U-R.