Is format preserving encryption suitable for use with words or names?
The obvious way to FPE strings of $N$ characters of [A-Za-z] is to treat the string as a base-52 value (with each character being a digit, say, A=0, B=1, ..., y=50, z=51); do a base conversion of that to an integer between 0 and $52^N-1$; use a standard FPE technique to encrypt that value into another integer between 0 and $52^N-1$, and do a base conversion back into a string of $N$ characters of [A-Za-z].

Because you're encrypting the string as a whole, you don't have the data leakage you would have if you encrypted each character individually.