A recent tag (about 1.5 months ago) was added under the name difference-in-meaning and is now used by 5 questions, but I believe it is a duplicate of the tag differences, used by 3,513 questions.
With so few questions impacted, the easiest course of action could be to have a users with the edit privilege (2,000 reputation) directly replacing the tag in those 5 questions. Otherwise, an alternative could be to make those tags synonyms.
What do you think?