evasion vs doublespeak

evasion and doublespeak both are nouns.

Word	Noun	Adjective	Verb	Adverb
evasion	Yes	No	No	No
doublespeak	Yes	No	No	No

As nouns, doublespeak is a hyponym of evasion; that is, doublespeak is a word with a more specific, narrower meaning than evasion:

evasion: a statement that is not literally false but that cleverly avoids an unpleasant truth
doublespeak: any language that pretends to communicate but actually does not

Other hyponyms of evasion include circumlocution, indirect expression, hedge, hedging, cavil, quibble, quiddity.

evasion (noun)	doublespeak (noun)
the act of physically escaping from something (an opponent or a pursuer or an unpleasant situation) by some adroit maneuver	any language that pretends to communicate but actually does not
nonperformance of something distasteful (as by deceit or trickery) that you are supposed to do
the deliberate act of failing to pay money
a statement that is not literally false but that cleverly avoids an unpleasant truth