banning vs test ban

banning and test ban both are nouns.

Word	Noun	Adjective	Verb	Adverb
banning	Yes	No	No	No
test ban	Yes	No	No	No

As nouns, test ban is a hyponym of banning; that is, test ban is a word with a more specific, narrower meaning than banning:

banning: an official prohibition or edict against something
test ban: a ban on the testing of nuclear weapons that is mutually agreed to by countries that possess nuclear weapons

banning (noun)	test ban (noun)
an official prohibition or edict against something	a ban on the testing of nuclear weapons that is mutually agreed to by countries that possess nuclear weapons