encroachment vs intrusion

encroachment and intrusion both are nouns.

Word	Noun	Adjective	Verb	Adverb
encroachment	Yes	No	No	No
intrusion	Yes	No	No	No

As nouns, encroachment and intrusion are synonyms defined as:

encroachment and intrusion: entry to another's property without right or permission

Other synonyms of encroachment include trespass, usurpation, violation.

As nouns, encroachment and intrusion are synonyms defined as:

encroachment and intrusion: any entry into an area not previously occupied

Other synonyms of encroachment include invasion.

encroachment (noun)	intrusion (noun)
entry to another's property without right or permission	entry to another's property without right or permission
influencing strongly	entrance by force or without permission or welcome
any entry into an area not previously occupied	any entry into an area not previously occupied
	rock produced by an intrusive process
	the forcing of molten rock into fissures or between strata of an earlier rock formation