Tantamount (adjective)

Equivalent in seriousness or importance; virtually the same.

Origin:

Late 16th century: from tantamount, on the pattern of words such as paramount.

Examples:

  1. His failure to attend the meeting was tantamount to insubordination.
  2. This mistake is tantamount to a disaster.
  3. His behavior was tantamount to treason.
  4. Leaving the door open is tantamount to an invitation to thieves.
  5. The results of the experiment were tantamount to a breakthrough in the field.
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