flach

The German word "flach" is an adjective that means "flat" or "level". It describes something that has a smooth, even surface without significant height or depth. Similar words in German include "eben" (even), "flächig" (plane, planar), and "niedrig" (low, though "niedrig" is more about height than flatness).

Differences:

• "Eben" is often used interchangeably with "flach" but specifically emphasizes evenness and smoothness.
• "Flächig" refers to something being a flat plane or surface but is less commonly used in everyday speech.
• "Niedrig" is not entirely synonymous; it usually refers to the height of an object from a base level, rather than how flat it is.

Each word can thus offer a slightly different nuance depending on the context in which you're describing something as flat or level.