Gun dog and Spaniel

Gun dog noun - A dog trained to work with sportsmen when they hunt with guns.

Spaniel and gun dog are semantically related. In some cases you can replace term "Spaniel" with "Gun dog", this terms are similar.

Spaniel noun - Any of several breeds of small to medium-sized gun dogs with a long silky coat and long frilled ears.

Gun dog and spaniel are semantically related. Sometimes you can use "Gun dog" instead a noun "Spaniel".