One is a noun, one is an adjective, and there is no overlap between them. A police officer. A naval officer.
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CliveMy dictionary also offers 'official' as a noun: a person holdng office or engaged in official duties.
eg Officials at the Ministry of Silly Walks refused to comment.
Officer can be interchangeable with official if you are referring to positions of authority in a large organization, such as a corporations. A company's executives, for example, can be known as the Officers of the company, or it's officials. Both have the definition of being associated with positions of authority in such organizations.
The word 'officer' according to Word Panda dictionary means a person who holds a position of rank or authority in the army, navy, air force, or any similar organization, especially one who holds a commission. And word 'official' means a person appointed or elected to an office or charged with certain duties. It's not