Using two words with the same or very similar meaning can be described in several ways, but the terms are not identical. “Redundancy,” “tautology,” and “pleonasm” are the most useful general terms, while “synonym pair” and “synonymous doublet” describe the paired words more specifically.
Which Linguistic Term Fits Best?
- Redundancy
- Tautology
- Pleonasm
- Synonym pair
- Synonymous doublet
Redundancy
The broadest term for unnecessary repetition of meaning, whether it involves two words or a longer phrase.
Example: In “advance planning,” some editors consider “advance” redundant because planning already concerns the future.
Tautology
A tautology repeats the same idea in different words, often making part of the expression logically unnecessary.
Example: The phrase “free gift” is often cited as a tautological expression because a gift is already free.
Pleonasm
Pleonasm is the use of more words than are needed to express a meaning, sometimes for emphasis and sometimes accidentally.
Example: “I saw it with my own eyes” is pleonastic because seeing already involves the eyes.
Synonym pair
This plain descriptive term refers to two words with the same or closely related meanings used together or compared as a pair.
Example: “Begin” and “start” form a synonym pair in many contexts.
Synonymous doublet
A linguistic term for two near-synonymous words used together, especially in fixed expressions or historically paired wording.
Example: “Cease and desist” is a familiar synonymous doublet in legal English.
Redundancy Is Not Always a Mistake
Repeated meaning can be deliberate. Legal formulas, rhetorical emphasis, and fixed expressions often keep near-synonymous words because the pairing has become conventional or adds force. Whether the wording should be edited depends on context, not just overlap in dictionary meaning.