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

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

Simpson has been one of the biggest enigmas in this year’s draft. —Antwan Staley, New York Daily News, 30 Mar. 2026

The labor market has been its own enigma. —Brian Cheung, NBC news, 5 Mar. 2026

Madrid’s president, who celebrates his 79th birthday on Sunday, is something of an enigma. —Guillermo Rai, New York Times, 3 Mar. 2026

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