Synonyms of enigma

enigma

noun

i-ˈnig-mə 

as in mystery

something hard to understand or explain

how Thomas Jefferson could be both a slaveholder and a champion of liberty remains an enigma

Synonyms & Similar Words

• mystery
• puzzle
• riddle
• conundrum
• why
• secret
• mystification
• puzzlement
• problem
• closed book
• head-scratcher
• perplexity
• challenge
• matter
• poser
• stumper
• trouble
• brainteaser
• case
• knot

Synonym Chooser

How does the noun enigma differ from other similar words?

Some common synonyms of enigma are mystery, problem, puzzle, and riddle. While all these words mean "something which baffles or perplexes," enigma applies to utterance or behavior that is very difficult to interpret.

his suicide remains an enigma

When would mystery be a good substitute for enigma?

The words mystery and enigma can be used in similar contexts, but mystery applies to what cannot be fully understood by reason or less strictly to whatever resists or defies explanation.

the mystery of the stone monoliths

When is it sensible to use problem instead of enigma?

In some situations, the words problem and enigma are roughly equivalent. However, problem applies to a question or difficulty calling for a solution or causing concern.

problems created by high technology

Where would puzzle be a reasonable alternative to enigma?

The words puzzle and enigma are synonyms, but do differ in nuance. Specifically, puzzle applies to an enigma or problem that challenges ingenuity for its solution.

the thief's motives were a puzzle for the police

When is riddle a more appropriate choice than enigma?

The meanings of riddle and enigma largely overlap; however, riddle suggests an enigma or problem involving paradox or apparent contradiction.

the riddle of the reclusive pop star

Example Sentences

Recent Examples of enigma

These cosmic enigmas defy our everyday understanding of space and time, swallowing light and matter and pushing the laws of physics to the extreme. —Kenna Hughes-Castleberry, Space.com, 2 Sep. 2025

Kendra is a little bit of an enigma. —Addie Morfoot, Variety, 2 Sep. 2025

Hamish Linklater teases the new Godolkin dean, Cipher, who lives up to his name as an enigma to decode. —EW.com, 27 Aug. 2025

Aaron is dyslexic and learns best with his hands—exactly the type of kid who has been an enigma to the public school system for decades. —Chandler Fritz, Harpers Magazine, 20 Aug. 2025

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