Delete cells with exactly three syllables

Forget about whether it's possible in Excel. Let me answer with a question about words: my question is whether it is possible to have a universally valid definition of what a syllable is, and how we would infallibly recognize one just based on looking at the word? 

There are, after all, so many combinations of consonants and vowels that make up our words, along with multiple ways to pronounce them; I'm certainly aware that hyphenation in automated texts doesn't always follow a reliable algorithm. Yet that's what you seem to be expecting.

I had a PhD friend who acknowledged he'd pronounced "epitome" as a three syllable word--"e pi tome"--that last section rhyming with "home"

He was very embarrassed to learn it was properly "e pi to me"

How would you propose that Excel would recognize whether it was three syllables or four, absent a database containing a complete dictionary?