Irrational impulse and Irrational motive

Irrational impulse noun - A strong spontaneous and irrational motivation.

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

Irrational motive noun - A motivation that is inconsistent with reason or logic.

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