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Search TERMIUM Plus®
To begin your search, go to the alphabetical index below and click on the first letter of the word you are searching for.

flammable, inflammable, non-flammable, non-inflammable

Use flammable to mean “capable of catching fire” and non-flammable as its opposite.

  • Flammable fabrics have been banned for use in children’s nightwear.
  • Christmas trees should be decorated with non-flammable materials.

For the sake of clarity, avoid inflammable (and its opposite, non-inflammable).

  • Inflammable is actually a synonym for flammable. However, the prefix in-may be interpreted as a negative and thus lead people to believe mistakenly that a product is safe from catching fire when it is not.