Synonyms for Tantamount:

adj.

equal (adjective)
equal, equivalent, identical, indistinguishable, alike, same, one and the same, like.
identical (adjective)
identical.
same (adjective)
as good as, equal, equivalent, identical, alike, like, parallel, indistinguishable.

n.

one and the same, on a par, even. equivalent (noun)
parallel.
tantamount (noun)
equal, equivalent, as good as.

Other synonyms:

even. Other relevant words:
even, one and the same, parallel, on a par, as good as.

Usage examples for tantamount

  1. For such a man cannot but feel that the proffered substitution would be tantamount if accepted, to an utter destruction of all that he regards as essentially religious. – A Candid Examination of Theism by George John Romanes
  2. The average Republican regarded this message as tantamount to a declaration of war. – Union and Democracy by Allen Johnson
  3. To be called " Berlinchick" or " Deitschel" was tantamount to being called infidel and epicurean, anarchist and outlaw. – The Haskalah Movement in Russia by Jacob S. Raisin