brownstone

As nouns the difference between brownstone and freestone

is that brownstone is (uncountable) a variety of brown to red-brown sandstone once popular as a building material while freestone is a type of stone that is composed of small particles and easily shaped, such as sandstone or limestone.

As nouns the difference between brownstone and flagstone

is that brownstone is (uncountable) a variety of brown to red-brown sandstone once popular as a building material while flagstone is a flat, rectangular piece of rock or stone used for paving or roofing.

As nouns the difference between brownstone and rowhouse

is that brownstone is a variety of brown to red-brown sandstone once popular as a building material while rowhouse is one of a row of houses situated side by side and sharing a common wall.

As nouns the difference between taxonomy and brownstone

is that taxonomy is the science or the technique used to make a classification while brownstone is (uncountable) a variety of brown to red-brown sandstone once popular as a building material.

As a noun brownstone

is a variety of brown to red-brown sandstone once popular as a building material.

As an adjective brownstoned is

built with brownstone.

Graystone is a related term of brownstone.

In uncountable terms the difference between brownstone and graystone

is that brownstone is a variety of brown to red-brown sandstone once popular as a building material while graystone is a type of gray, volcanic rock, typically containing feldspar and iron.