encroaching vs invasive

encroaching and invasive both are adjectives.

Word	Noun	Adjective	Verb	Adverb
encroaching	No	Yes	No	No
invasive	No	Yes	No	No

As adjectives, encroaching and invasive are synonyms defined as:

encroaching and invasive: gradually intrusive without right or permission

Other synonyms of encroaching include trespassing.

encroaching (adjective)	invasive (adjective)
gradually intrusive without right or permission	marked by a tendency to spread especially into healthy tissue
	relating to a technique in which the body is entered by puncture or incision
	gradually intrusive without right or permission
	involving invasion or aggressive attack