The spelling of the word "cambon" can be explained using the International Phonetic Alphabet (IPA) transcription. The IPA phonetic notation for "cambon" is /kæmbɒn/. The initial sound is a voiceless velar stop /k/, followed by a short vowel /æ/, represented by the symbol "a". The following sound is a voiced bilabial nasal /m/. Finally, the word ends with a short vowel /ɒ/, represented by the symbol "o", and a voiced alveolar nasal /n/. Thus, the correct spelling of the word is "cambon".