List of fourth synonyms and fourth related words.
consecutive intervals, degree, diapason, diatessaron, diatonic interval, diatonic semitone, enharmonic diesis, enharmonic interval, farthing, fifth, fourth part, half step, halftone, interval, less semitone, melodic interval, note, octave, one-fourth, parallel octaves, quart, quarter, quartern, quarto, second, semitone, seventh, sixth, step, third, tone, twenty-five cents, twenty-five percent, two bits, unison interval, whole step