Domain-driven design includes the idea of a “ubiquitous language” where the engineers and the domain experts and the product owners come together and agree on consistent terminology for all the domain concepts, and the project then uses that terminology everywhere.

But on the projects I’ve been involved with, much more common is a situation where the requirements docs mostly use one term but sometimes use a different name for the same thing because the docs were worked on by two people who disagreed on the terms, the designers decide they don’t like how the words look so the UI calls the concept something else, the database designer reverses the term’s word order to fit their personally-preferred schema naming conventions, the API designer invents a compound name that includes both the UI and the database names, and so on. (I only barely exaggerate.) Which names map to which other names becomes tribal knowledge that’s usually not written down anywhere.

This kind of thing bugs me a lot, but I seem to be in the minority. I recognize that it makes very little functional difference, but it just feels sloppy to me and I don’t like having to remember multiple names for things.

So, my question to you fine folks: do you think using consistent names for domain concepts across the board actually makes a meaningful difference in terms of code maintainability and discoverability? Or is the effort required to keep the names consistent over time actually greater than the mental overhead of working with the inconsistent names?