Irresistible impulse and Irrational impulse

Irresistible impulse noun - An urge to do or say something that might be better left undone or unsaid.

Irrational impulse and irresistible impulse are semantically related. In some cases you can use "Irrational impulse" instead a noun phrase "Irresistible impulse".

Irrational impulse noun - A strong spontaneous and irrational motivation.

Irresistible impulse and irrational impulse are semantically related. Sometimes you can replace phrase "Irresistible impulse" with "Irrational impulse", this phrases are similar.