Adelie and Penguin

Adelie noun - Medium-sized penguins occurring in large colonies on the Adelie Coast of Antarctica.

Penguin and adelie are semantically related. In some cases you can use "Penguin" instead a noun "Adelie".

Penguin noun - Short-legged flightless birds of cold southern especially Antarctic regions having webbed feet and wings modified as flippers.

Adelie and penguin are semantically related. Sometimes you can replace term "Adelie" with "Penguin", this nouns are similar.