The phrase "identical thing" refers to something that is indistinguishable from another object or entity. Some synonyms for this phrase include "exact same item," "mirror image," "clone," "replica," "twin," "duplicate," "match," or "identical copy." These words can be used interchangeably to describe an object or person that is identical to another. Whether it's a pair of shoes, a set of keys, or a set of identical twins, these synonyms can help to convey the concept of sameness and similarity. Identical things are often difficult to tell apart and are often used to emphasize the precision and accuracy of a particular object or idea.