diligence vs application

diligence and application both are nouns.

Word	Noun	Adjective	Verb	Adverb
diligence	Yes	No	No	No
application	Yes	No	No	No

As nouns, diligence and application are synonyms defined as:

diligence (noun)	application (noun)
a diligent effort	the action of putting something into operation
persevering determination to perform a task	a diligent effort
conscientiousness in paying proper attention to a task; giving the degree of care required in a given situation	the act of bringing something to bear; using it for a particular purpose
	the work of applying something
	liquid preparation having a soothing or antiseptic or medicinal action when applied to the skin
	a verbal or written request for assistance or employment or admission to a school
	a program that gives a computer instructions that provide the user with tools to accomplish a task