The crossword solution for the term KIN OF -ISH is OID, which is a three-letter word. OID is an adjective that means resembling or related to something else. It is derived from the Greek suffix '-oid', which means 'having the form or likeness of'. OID is often used to describe something that is similar to another thing, but not quite the same. For example, a humanoid robot could be described as 'android-oid'.