Muskrat and Rodent

Muskrat noun - Beaver-like aquatic rodent of North America with dark glossy brown fur.

Rodent and muskrat are semantically related. In some cases you can use "Rodent" instead a noun "Muskrat".

Rodent noun - Relatively small placental mammals having a single pair of constantly growing incisor teeth specialized for gnawing.

Muskrat and rodent are semantically related. Sometimes you can replace term "Muskrat" with "Rodent", this nouns are similar.