How should compound words be handled when coding? Is there a definitive list of compound words? [closed]

Question

QUESTION:

How should you handle compound words when programming?

Are there any good lists available online for developers of generally accepted technology-related compound words?

I can see how this is highly ambiguous, so should I just use common-sense?

EXAMPLE:

I would be inclined to do this:

filename NOT FileName

or

login NOT LogIn

However, the microsoft documentation indicates that filename is not compound. So I wonder, is there a more definitive source? See also, this english.stackexchange discussion on filename.

Under the section "Capitalization Rules for Compound Words and Common Terms" located here: Microsoft .NET Capitalization Conventions only offers a limited introduction into the topic, and leaves it up to the developer to use their intuition with the rest.