* άλλος (allos): This is a common and versatile word meaning "other" or "another." It's often used for a single, additional item. For example, "Give me another apple" would be "Δώσε μου ένα άλλο μήλο" (Dose mou ena allo milo).
* ένας άλλος (enas allos): This translates literally to "one other" and is useful when you need to specify "one more" of something.
* ένας ακόμη (enas akomi): This means "one more" and is a good choice when referring to an additional item in a series or quantity.
* κι άλλος (ki allos): This is a more colloquial and shorter version, meaning "and another"
The best choice will depend on the specific sentence.