syn-, sy-, sym-, syl-, sys-

(Greek: with, together with; also by extension: united; same, similar; at the same time)

syncane
syncanthus
Adhesion of the eyeball to orbital structures.
syncarp
syncarpous
syncarpy
syncaryon
syncelom
syncephalus
Conjoined twins with heads fused into one with two bodies, where there is a single face, with four ears.

This group includes the various types of craniopagus (twins with fused skulls), cephalopagus (twins with heads fused but the remainder of the bodies are separate), and cephalothoracopagus (a twin fetus united at the head, neck, and thorax).

syncheiria, synchiria
A form of dyscheiria, or dyschiria, in which the subject refers a stimulus applied to one side of the body to both sides.
synchesis
synchilia, syncheilia
1. A congenital anomaly in which there is a complete or a partial fusion of the lips.
2. A more or less complete adhesion or joining of the lips together.
synchodroses
syncholia
synchondrectomy
synchondroseotomy

Inter-related cross references, directly or indirectly, involving word units dealing with "equal, identical, same, similar": auto-; emul-; equ-, equi-; homeo-; homo-; iso-; pari-; peer; rhomb-; tauto-.