The spelling of the word "rendon" can be confusing because it includes the letter "d" and the vowel combination of "eo." In phonetic transcription, "rendon" is pronounced as /ˈrɛndɒn/. The letter "e" in this word is pronounced with a schwa sound, which means it is pronounced with a short and weak vowel sound. The combination of "eo" is pronounced as a diphthong, combining the sounds of /i/ and /o/ to create a single syllable sound.