tantamount

/ˈtæntəˌmaʊnt/
adjective
  1. Equivalent in effect or value; essentially the same as something else.
    • Refusing to help in an emergency is tantamount to causing harm.
    • His silence was tantamount to an admission of guilt.
    • For many people, losing their phone is tantamount to losing a part of their memory.
Antonyms
What does "tantamount" mean? | whatsthatwordmean | whatsthatwordmean