Explanation and Discussion

A number of English words exist as a single word or as two words.
The spelling may change while the pronunciation doesn't, however, the meaning does change.
Some of those word situations have been listed here.
We then indicate the differences between the two including the different meanings.

1. almost -- all most

The plane was almost (nearly) three hours late.
We are all most pleased (all very much) with the new schedule.

2. already -- all ready

The order had already (previously) been shipped.
The order is all ready (all prepared) to be shipped.