The spelling of the word "comtrace" follows the rules of English phonetics. In IPA phonetic transcription, it would be written as /kɒm.trəs/. The "c" is pronounced as /k/, the "o" as /ɒ/, the "m" as /m/, and the "t" as /t/. The "r" is pronounced as a flap sound /ɾ/ in American English, and as an alveolar trill /r/ in other dialects. The "a" is pronounced as a schwa /ə/, and the "ce" as /s/. In summary, "comtrace" is spelled according to the sounds that make up the word.