"legislator," 1620s, from Greek Solon, name of early lawgiver of Athens, one of the seven sages. Often, especially in U.S., applied (with perhaps a whiff of sarcasm) by journalists to Congressmen, township supervisors, etc. It also is a useful short headline word.
solitude
solmization
solo
soloist
Solomon
solon
solstice
solstitial
solubility
soluble
solum