prowler vs trespasser

prowler and trespasser both are nouns.

Word	Noun	Adjective	Verb	Adverb
prowler	Yes	No	No	No
trespasser	Yes	No	No	No

As nouns, trespasser is a hypernym of prowler; that is, trespasser is a word with a broader meaning than prowler:

prowler: someone who prowls or sneaks about; usually with unlawful intentions
trespasser: someone who intrudes on the privacy or property of another without permission

Other hypernyms of prowler include interloper, intruder.

prowler (noun)	trespasser (noun)
someone who prowls or sneaks about; usually with unlawful intentions	someone who intrudes on the privacy or property of another without permission