From Bibliotheca Anonoma

Sol or so is the fifth syllable in Solresol's alphabet. It can be represented with the written or spoken 'sol', the letter combination 'so', the color teal, a horizontal line (in the Solresol stenography), the number 5, the musical note G (in fixed do solfège), or the fiftth note of any major musical scale (in movable do solfège). It is preceded by the note fa and followed by the note la.

The word sol means "if."

Four-syllable words beginning with the syllable sol are generally related to "theater, literature, fine arts, and science."

The word solsol, sometimes written as SOL, indicates that a verb is in the imperative tense.

Words beginning with sol that are either four syllables with a repeated syllable in them or three syllables are generally dedicated to sickness and medicine. It shares this designation with fa.