Consider an alphabet $A$ comprised of singleton symbols, so for example we might have $A=\{a,b,c,...,z\}$ or even $A=\{0,1\}$ among many others. The length of each symbol in these alphabets is one.
If I took as my alphabet the set of all words appearing in the Oxford English Dictionary, would each word (word here in the sense of symbol in my alphabet) have length one?