signal; signalling; signaling; traffic light; traffic signal
versus; against; to (e.g. score of 4 to 2, ratio of 3 to 1, vote of 320 to 180); toward ...; to ...; equal footing
noise (usu. unpleasant); interference (e.g. radio); static; gossip; irresponsible criticism
ratio; proportion; match; equal; compared with ...; relative to ...