Impel is to urge; 'The water shortage impels us to keep in mind our water usage' Compel is to force; 'The water shortage compels us to fine anybody watering their lawn in daylight'
Although I am not an expert in these two terms. I was curious and did a little research and it appears that compel means to force someone else, impel means you, yourself feel forced.
difference between clucth and coupling
difference between coupling and socket
Relation between phase difference and path difference is path difference/wavelength=phase difference/2*pi
There is no difference between micrometres and microns
What is technical difference between colorimeter and turbiditymeter
bound, commanded, impelled, called by duty, committed, compelled, duty-bound, indebted, obligated, pledged, required, under obligation
I was frozen in awe by the beautiful, striking colors of the floating terror as it unhurriedly impelled itself past my position on the reef.
Repelled
It is a verb meaning to be guided toward action by moral pressure.
I was impellled to tell her the truth
Impelled, herded, shooed
I was impelled by events to take a stand
difference between as on and as at
Madame Kovarian impelled me to kill the Doctor.
Elizabeth was finally impelled to believe Mr. Darcy.
compelled He felt compelled to return the old lady's wallet.
compelled He felt compelled to return the old lady's wallet.