Domestic cat and Siamese cat

Domestic cat noun - Any domesticated member of the genus Felis.

Siamese cat and domestic cat are semantically related. In some cases you can replace phrase "Siamese cat" with "Domestic cat", this phrases are similar.

Siamese cat noun - A slender short-haired blue-eyed breed of cat having a pale coat with dark ears paws face and tail tip.

Domestic cat and Siamese cat are semantically related. You can use "Domestic cat" instead a noun phrase "Siamese cat".