Prairie dog and Rodent

Prairie dog noun - Any of several rodents of North American prairies living in large complex burrows having a barking cry.

Rodent and prairie dog are semantically related. In some cases you can use "Rodent" instead a noun phrase "Prairie dog".

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

Prairie dog and rodent are semantically related. Sometimes you can replace phrase "Prairie dog" with "Rodent", this terms are similar.