How many syllables are possible in English?
There are about 50 different onsets, 25 different nucleii and 80 different codas in English, which gives about 100,000 possible syllables. However only about 15,000 of these actually occur in English words, and only about 10,000 of these occur as mono-syllabic words.
How many syllable sounds are there?
I'm going to give you a very specific number, 15,831. That is how many syllables there are in the English language. A syllable is a vowel sound with or without consonants.