intruder vs entrant

intruder and entrant both are nouns.

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

As nouns, entrant is a hypernym of intruder; that is, entrant is a word with a broader meaning than intruder:

intruder: someone who intrudes on the privacy or property of another without permission
entrant: someone who enters

Other hypernyms of intruder include persona non grata, unwelcome person.

intruder (noun)	entrant (noun)
someone who intrudes on the privacy or property of another without permission	a commodity that enters competition with established merchandise
	one who enters a competition
	any new participant in some activity
	someone who enters