inroad vs violation

inroad and violation both are nouns.

Word	Noun	Adjective	Verb	Adverb
inroad	Yes	No	No	No
violation	Yes	No	No	No

As nouns, violation is a hypernym of inroad; that is, violation is a word with a broader meaning than inroad:

Other hypernyms of inroad include encroachment, intrusion, trespass, usurpation.

inroad (noun)	violation (noun)
an invasion or hostile attack	a crime less serious than a felony
an encroachment or intrusion	entry to another's property without right or permission
	the crime of forcing a person to submit to sexual intercourse against his or her will
	a disrespectful act
	an act that disregards an agreement or a right