Letters that make run-in
n, r, i, u are letters that make 'run-in'
1 possible definitions for 'run-in'
Under this definition, run-in is a noun and has the following properties:
'run-in' can be a type of dispute, difference, difference of opinion, conflict.
affray, spat, fuss, altercation, fracas, bicker, bickering, tiff, squabble, pettifoggery, bust-up are types of 'run-in'.
argufy, altercate, quarrel, scrap, dispute, wrangle, brawl are derivatives of 'run-in'.