Mashed potato and White potato

Mashed potato noun - Potato that has been peeled and boiled and then mashed.

White potato and mashed potato are semantically related. In some cases you can use "White potato" instead a noun phrase "Mashed potato".

White potato noun - Annual native to South America having underground stolons bearing edible starchy tubers; widely cultivated as a garden vegetable; vines are poisonous.

Mashed potato and white potato are semantically related. Sometimes you can replace phrase "Mashed potato" with "White potato", this phrases are similar.