entrant vs intruder

entrant and intruder both are nouns.

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

As nouns, intruder is a hyponym of entrant; that is, intruder is a word with a more specific, narrower meaning than entrant:

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

Other hyponyms of entrant include interloper, trespasser.

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