Free, gratis.
Free.
Free
bum
Accounting
rubbish nothing
Empty
Another word for overhead is "expenses." In a business context, it can also refer to "indirect costs," which are the costs not directly tied to the production of goods or services. Other synonyms include "burden" and "administrative costs," depending on the specific context.
nothing
nothing on wikipedia is true
nothing!
The other 4 letter word is none.
1. Zero 2. Nonezilch means nothing - it's in the dictionary