As nouns the difference between irresponsible and powermonger
is that irresponsible is someone who is not responsible while powermonger is a person who wields power in a tyrannical or irresponsible fashion.
As an adjective irresponsible
is lacking a sense of responsibility; incapable of or not chargeable with responsibility; unable to respond to obligation.
irresponsible
English
Adjective
(
en adjective)
Lacking a sense of responsibility; incapable of or not chargeable with responsibility; unable to respond to obligation.
Not responsible; not subject to responsibility; not to be held accountable, or called into question.
Noun
(
en noun)
Someone who is not responsible.
References
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powermonger
English
Noun
(
en noun)
A person who wields power in a tyrannical or irresponsible fashion.