evasion vs elusion

evasion and elusion both are nouns.

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

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

evasion: the act of physically escaping from something (an opponent or a pursuer or an unpleasant situation) by some adroit maneuver
elusion: the act of avoiding capture (especially by cunning)

Other hyponyms of evasion include eluding, slip, evasive action, maneuver, manoeuvre, dodge.

evasion (noun)	elusion (noun)
the act of physically escaping from something (an opponent or a pursuer or an unpleasant situation) by some adroit maneuver	the act of avoiding capture (especially by cunning)
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