Intrusion is a noun.
The word 'intrusion' is a noun.
"Intrusion" is a noun.
"Intrusion" is a noun. Words ending in "-ion" are virtually always nouns.
"Intrusion" is a noun. It refers to an act or instance of intruding or an unwanted presence that disrupts or interrupts something.
All of those words are nouns.
part of speech
The part of speech for this particular word is a noun.
The part of speech for "answer" is a noun.
adverb
what part of speech is beneath
The part of speech for "explicit" is an adjective.
The part of speech for "twirl" is a verb.
The part of speech for "unfamiliar" is an adjective.