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

Even as a unifying hypothesis was forming, the disease remained an enigma. —Courtney Crowder, USA Today, 10 Apr. 2026

Toss in plenty of brutal murders, bizarre prophecies, time-bending enigmas, and haunting hallucinations — all seemingly tied to Lucy’s mysterious meetings with the Hannibal Lecter-like Gideon Shepherd (Peter Capaldi) — and this one's well worth losing six hours of sleep over. —Matt Cabral, Entertainment Weekly, 10 Apr. 2026

An enigma in tinted glass, its signature flavor comes from a compound that may or may not come from actual nuts. —Emily Saladino, Bon Appetit Magazine, 9 Apr. 2026

While the fort remains an enigma, archeologists hope that further examination will reveal more information about the site’s builders and their story. —Anne Doran, ARTnews.com, 8 Apr. 2026

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