entry vs irruption

entry and irruption both are nouns.

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

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

entry (noun)	irruption (noun)
the act of entering	a sudden violent entrance; a bursting in
the act of beginning something new	a sudden violent spontaneous occurrence (usually of some undesirable condition)
something that provides access (to get in or get out)	a sudden sharp increase in the relative numbers of a population
something (manuscripts or architectural plans and models or estimates or works of art of all genres etc.) submitted for the judgment of others (as in a competition)
an item inserted in a written record
a written record of a commercial transaction