interloper vs intruder

interloper and intruder both are nouns.

Word	Noun	Adjective	Verb	Adverb
interloper	Yes	No	No	No
intruder	Yes	No	No	No

As nouns, interloper and intruder are synonyms defined as:

interloper and intruder: someone who intrudes on the privacy or property of another without permission

Other synonyms of interloper include trespasser.

interloper (noun)	intruder (noun)
someone who intrudes on the privacy or property of another without permission	someone who intrudes on the privacy or property of another without permission