Longman Dictionary of Contemporary English homepage

interchangeable

 adjective
     
in‧ter‧change‧a‧ble
things that are interchangeable can be used instead of each other:
These two words are almost interchangeable.
a camera with interchangeable lenses
—interchangeably adverb
—interchangeability noun [uncountable]
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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