Memel vs Klaipeda

Memel and Klaipeda both are nouns.

Word	Noun	Adjective	Verb	Adverb
Memel	Yes	No	No	No
Klaipeda	Yes	No	No	No

As nouns, Memel and Klaipeda are synonyms defined as:

Memel and Klaipeda: a city in western Lithuania on the Baltic Sea; formerly an important trading town of the Hanseatic League

Memel (noun)	Klaipeda (noun)
a city in western Lithuania on the Baltic Sea; formerly an important trading town of the Hanseatic League	a city in western Lithuania on the Baltic Sea; formerly an important trading town of the Hanseatic League