Thiotricha synacma is a moth of the Gelechiidae family. It was described by Meyrick in 1918. It is found in India (Assam). The wingspan is about 12 mm. The forewings are fuscous with ochreous-white markings. There is a broad pointed median streak from the base to near the apex and a streak from beneath this before the middle to the tornus. A line is found along the costa from the middle to a short oblique line from the costa terminating above the apex of the median streak and there is a very oblique line from above the tornus to beneath the apex of the median streak. A wedge-shaped streak is found along the lower half of the termen and a fine transverse blue-leaden-metallic line just beyond these markings before the apex. The apex is ochreous-tinged and there is a small black apical dot pr