Every natural number can be described in 14 words or less.
Proof: Assume the contrary.
There exists a smallest number n which cannot be described in 14 words or less.
So n is "the smallest natural number which cannot be unambiguously described in fourteen words or less."
The above is a complete and unambiguous description of n.
This is a contradiction.
Therefore every natural number can be unambiguously described in 14 words or less.