It can be. Most exterior front doors are mahogany, oak or metal with a few fiberglass ones as well. Interior doors are usually a Masonite product, hollow core. Some are still made from solid pine, a soft wood.
You can purchase hardwood doors at your local Lowe's home improvement store. You can also purchase one online from websites such as Simpson Door, Solid Hardwood Doors, and Doors 4 Home.
Ash is a hardwood.
Deciduous trees are hardwood. e.g oak
Engineered hardwood floors can be floated, but not solid hardwood floors.
Beech wood comes from a flowering tree so it is a hardwood. Not all hardwoods are hard though balsa wood is a hardwood!
Hardwood
Hardwood.
Yes
hardwood
Hardwood comes from trees with wide leaves, while softwood comes from conifers like cypress and pines. The chestnut tree is a hardwood tree.
Ironwood was of hardwood, for irons can definitely being of hardness.
Engineered hardwood floors can be floated, but not solid hardwood floors.