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

Their sudden exit from the fossil record has remained one of anthropology’s most enduring enigmas, until now. —Mrigakshi Dixit, Interesting Engineering, 29 Dec. 2025

However, both teams have been an enigma since then, with neither putting up inspiring performances. —Jordan Mendoza, USA Today, 19 Dec. 2025

The very idea of an antisemitic campaign following the massive Soviet losses in World War II presents an enigma. —Wendy Z. Goldman, The Conversation, 1 Dec. 2025

One encounters echoes of this legendary order in Siesbye’s bowls, as if the works present modern retellings of an ancient epic, embodying deep time and the present moment, directness and enigma alike. —Ayşegül Savaş, New Yorker, 30 Nov. 2025

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