irruption vs population growth

irruption and population growth both are nouns.

Word	Noun	Adjective	Verb	Adverb
irruption	Yes	No	No	No
population growth	Yes	No	No	No

As nouns, population growth is a hypernym of irruption; that is, population growth is a word with a broader meaning than irruption:

irruption: a sudden sharp increase in the relative numbers of a population
population growth: increase in the number of people who inhabit a territory or state

irruption (noun)	population growth (noun)
a sudden violent entrance; a bursting in	increase in the number of people who inhabit a territory or state
a sudden violent spontaneous occurrence (usually of some undesirable condition)
a sudden sharp increase in the relative numbers of a population