defiant vs noncompliant

defiant is not a noun while noncompliant is a noun.

Word	Noun	Adjective	Verb	Adverb
defiant	No	Yes	No	No
noncompliant	Yes	Yes	No	No

As adjectives, defiant and noncompliant are synonyms defined as:

defiant and noncompliant: boldly resisting authority or an opposing force

defiant (noun)	noncompliant (noun)
	a person who refuses to comply

defiant (adjective)	noncompliant (adjective)
boldly resisting authority or an opposing force	boldly resisting authority or an opposing force