Data processing and Word processing

Data processing noun - (computer science) a series of operations on data by a computer in order to retrieve or transform or classify information.

Word processing and data processing are semantically related In some cases you can replace phrase "Word processing" with "Data processing", this phrases are similar.

Word processing noun - Rapid and efficient processing (storage and printing) of linguistic data for composition and editing.

Data processing and word processing are semantically related in document creation and editing topic. You can use "Data processing" instead a noun phrase "Word processing".