Synthesis (stylised as sýnthesis) is the third studio album by Filipino actress-singer Glaiza de Castro, released on April 18, 2015 by Homeworkz Services in the Philippines. The album is self-produced and was described by de Castro as a mixture of pop and rock.
Synthesis consists of eight tracks and was certified gold on September 29, 2015 by the Philippine Association of the Record Industry (PARI). For this album, de Castro earned the Female Rock Artist of the Year award at the 7th PMPC Star Awards for Music.