violation vs inroad

violation and inroad both are nouns.

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

As nouns, inroad is a hyponym of violation; that is, inroad is a word with a more specific, narrower meaning than violation:

violation (noun)	inroad (noun)
a crime less serious than a felony	an invasion or hostile attack
entry to another's property without right or permission	an encroachment or intrusion
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