Well, since stubborn has 8 letters, I guess not.
Dodo
fraternity
The word stubborn has two syllables. The syllables in the word are stub-born.
There are four syllables in the word "usually".
Pedestrian has four syllables.
The word beatitude has four syllables. Be-at-i-tude.
There are four syllables in the word "patriotic."
There are four syllables in the word "geraniol."
there are four syllables in the word associates.
li-brar-i-an has four syllables.
The word metropolis has four syllables. The syllables are me-tro-po-lis.
Well its obviously not four letters but it does have two syllables.