different between instrumentalism vs consequentialism

English

instrumental +? -ism

instrumentalism (countable and uncountable, plural instrumentalisms)

(philosophy) In the philosophy of science, the view that concepts and theories are merely useful instruments whose worth is measured not by whether the concepts and theories are true or false (or correctly depict reality), but how effective they are in explaining and predicting phenomena.
- 1908, Josiah Royce, The Problem of Truth in Light of Recent Discussion
  Instrumentalism views truth as simply the value belonging to certain ideas in so far as these ideas are biological functions of our organisms, and psychological functions whereby we direct our choices and attain our successes.

From French instrumentalisme

instrumentalism n (uncountable)

consequential +? -ism, coined by British analytic philosopher G. E. M. Ascombe in 1958.

consequentialism (countable and uncountable, plural consequentialisms)

(ethics) The ethical study of morals, duties and rights with an approach that focuses consequences of a particular action or cause.
(ethics) The belief that consequences form the basis for any valid moral judgment about an action. Thus, from a consequentialist standpoint, a morally right action is one that produces a good outcome, or consequence.

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