diversion vs diversionary attack

diversion and diversionary attack both are nouns.

Word	Noun	Adjective	Verb	Adverb
diversion	Yes	No	No	No
diversionary attack	Yes	No	No	No

As nouns, diversion and diversionary attack are synonyms defined as:

diversion and diversionary attack: an attack calculated to draw enemy defense away from the point of the principal attack

diversion (noun)	diversionary attack (noun)
an activity that diverts or amuses or stimulates	an attack calculated to draw enemy defense away from the point of the principal attack
a turning aside (of your course or attention or concern)
an attack calculated to draw enemy defense away from the point of the principal attack