Synonyms & Antonyms of unnatural

See the Dictionary Definition 

Frequently Asked Questions About unnatural

How is the word unnatural distinct from other similar adjectives?

The words anomalous and irregular are common synonyms of unnatural. While all three words mean "not conforming to rule, law, or custom," unnatural suggests what is contrary to nature or to principles or standards felt to be essential to the well-being of civilized society.

prisoners treated with unnatural cruelty

When could anomalous be used to replace unnatural?

The meanings of anomalous and unnatural largely overlap; however, anomalous implies not conforming to what might be expected because of the class or type to which it belongs or the laws that govern its existence.

her drive made her an anomalous figure in a sleepy organization

When is irregular a more appropriate choice than unnatural?

The words irregular and unnatural are synonyms, but do differ in nuance. Specifically, irregular implies not conforming to a law or regulation imposed for the sake of uniformity in method, practice, or conduct.

concerned about his irregular behavior

Keep scrolling for more

Learn More about unnatural

Time Traveler for unnatural

Time Traveler

The first known use of unnatural was in the 14th century

See more words from the same century

Cite this Entry

“Unnatural.” Thesaurus, Merriam-Webster, Accessed 31 Oct. 2020.

Keep scrolling for more

More from Merriam-Webster on unnatural

Dictionary: Definition of unnatural

Nglish: Translation of unnatural for Spanish Speakers

Britannica English: Translation of unnatural for Arabic Speakers

Comments on unnatural

What made you want to look up unnatural? Please tell us where you read or heard it (including the quote, if possible).


Test Your Vocabulary

Here Be Dragons: A Creature Identification Quiz

  • monster werewolf photo
  • Which is a synonym of werewolf?
Spell It

Can you spell these 10 commonly misspelled words?


Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!