When it comes to describing the practice of reproducing text exactly as it appears in a written source, there are a variety of synonyms for the phrase "word for word and letter for letter." Some possible options include "verbatim," "copying verbatim," "literal," "faithful," "exact," "precise," and "unabridged." Each of these terms conveys the idea of reproducing text with a high degree of accuracy and fidelity, without any alterations or omissions. Depending on the context, one of these synonyms may be more appropriate than others, but all share the common trait of emphasizing the importance of exact reproduction.