Someone who intrudes.

plural of intruder

(intransitive) To thrust oneself in; to come or enter without invitation, permission, or welcome; to encroach; to trespass. / (transitive) To force in.

simple past tense and past participle of intrude

(geology) Intrusive.

present participle of intrude

intrusion

Third-person singular simple present indicative form of intrude

That can form an intrusion. / Capable of being intruded into.

plural of intruding