establish vs affirm

establish and affirm both are verbs.

Word	Noun	Adjective	Verb	Adverb
establish	No	No	Yes	No
affirm	No	No	Yes	No

As verbs, affirm is a hypernym of establish; that is, affirm is a word with a broader meaning than establish:

establish: establish the validity of something, as by an example, explanation or experiment
affirm: establish or strengthen as with new evidence or facts

Other hypernyms of establish include confirm, corroborate, substantiate, support, sustain.

establish (verb)	affirm (verb)
establish the validity of something, as by an example, explanation or experiment	establish or strengthen as with new evidence or facts
institute, enact, or establish	to declare or affirm solemnly and formally as true
use as a basis for; found on	say yes to
place
set up or lay the groundwork for
bring about
build or establish something abstract
set up or found