Astern and Aback

Astern adverb - Near, toward, or in the stern of a ship or the tail of an aircraft.

Aback and astern are semantically related. In some cases you can use "Aback" instead the word "Astern" as an adjective or an adverb.

Aback adverb - Without warning.

Astern and aback are semantically related. You can use "Astern" instead the word "Aback" as an adjective or an adverb.