A cache is a hidden store of something, whether that is buried supplies or the temporary data your browser keeps for quick loading. Cash is money, either as physical notes and coins or funds in general. If you are talking computers or a hidden stash, it is cache; if you mean paying with notes and coins, it is cash.
The core difference
Cache is a hidden store of items or data, while cash is physical or general money.
- cache — a hidden store of items kept for future use: Rangers found a cache of supplies buried near the trailhead.
- cache — (computing) fast storage that keeps recently used data: Clearing your browser's cache can fix a page that will not load properly.
- cash — physical money, notes and coins: He paid for the taxi in cash.
How to tell them apart
The word cache keeps its French look and its silent final e, which is a useful memory hook: it is a hidden thing you cannot always see, tucked away like the e at the end of the word. Cash, on the other hand, ends plainly, just like a straightforward payment in notes and coins.
The mix-up is common in tech and finance writing, where a browser cache and a cash payment can appear in the same sentence about online shopping, and the near-identical sound of the two words makes it easy to type the wrong one without noticing.
