entrance vs irruption

entrance and irruption both are nouns.

Word	Noun	Adjective	Verb	Adverb
entrance	Yes	No	Yes	No
irruption	Yes	No	No	No

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

entrance (noun)	irruption (noun)
the act of entering	a sudden violent entrance; a bursting in
something that provides access (to get in or get out)	a sudden violent spontaneous occurrence (usually of some undesirable condition)
a movement into or inward	a sudden sharp increase in the relative numbers of a population

entrance (verb)	irruption (verb)
put into a trance
attract; cause to be enamored