Killick is a term used to refer to small, anchor-shaped weights that are commonly used to secure boats and ships in shallow water. Though it is not a frequently used word, there are several synonyms or alternative words used to describe a killick. These can include "grapnel," which is a small anchor with several hooks to hold onto objects, "mud hook," which is a type of anchor that is used to grab and hold onto the muddy bottom of a water body, and "pick," which is a small anchor designed for boats and ships. Other synonyms for killick include "hook," "anchor stone," and "drift anchor".