Cochineal and Scale insect

Cochineal noun - Mexican red scale insect that feeds on cacti; the source of a red dye.

Scale insect and cochineal are semantically related. In some cases you can use "Scale insect" instead a noun "Cochineal".

Scale insect noun - Small homopterous insect that usually lives and feeds on plants and secretes a protective waxy covering.

Cochineal and scale insect are semantically related. Sometimes you can replace term "Cochineal" with "Scale insect", this terms are similar.