The spelling of the word "Tentbed" can be explained using the International Phonetic Alphabet (IPA) phonetic transcription. It is spelled as /tɛntbɛd/, where the first syllable "tent" is pronounced with a short "e" sound followed by "nt" consonant cluster. The second syllable "bed" is pronounced with a short "e" sound and "d" consonant. Overall, "Tentbed" is a compound word combining "tent" and "bed", referring to a portable bed that can be assembled within a tent.