mahogany
Electric wise woods that can/are include: Body Mahogany, alder, ash, basswood, NATO, poplar, maple Cap (if any) Maple (flamed, quilted, popeye, burl, spalted, plain, etc) Neck Mahogany, maple (incl fingured), NATO Fingerboard Rosewood, maple (incl figured maple), ebony, sometimes bubinga Then theres various metals including chromium, nickel, steel etc used for the hardware. Then we have plastic used for things like the pickguard and stuff.
Cheaper models use Alder, Ash, Maple, and even Synthetics. More High-End models use Mahogany, Spalted maple, Quilted Maple, Flame Maple, Brazilian Koa, and Peacock Koa.
the main woods are mahogany, maple and rosewood. although their are exotic woods like ovangkhol, and woods like the Brazilian or Indian spruce.
Oak, mahogany, figandred wood.
Alder is fine as firewood. It burns fine but it burns fast as it is not a very dense wood. Denser woods burn hotter and slower.
the oine
Mohagony is not as responsive to mid-range frequencies as Alder, which has a large swirling grain pattern and rings that adds to the stiffness and complexity of tones. Koa is oilier than Mahogany and has highs that are more in the upper mid-range. Rosewood is an oilier wood as well which dampens some of the highs. Spruce is the most full frequency body material used for guitars. Maple has two variations, hard and soft, that make a large difference in the sound. Basswood is inexpensive compared to other guitar woods, and is also easy to work with (sand, seal, etc.). Poplar has a tone similar to that of Alder. Ebony is heavier than most woods and therefore has rich tones.
They can all make hardwood furniture. :)
Usually beds are made of hard woods such as cherry, mahogany, or oak.
Hickory, oak, ash, and maple.
According to my research and personal experience, both alder and agathis are considered soft woods, but I believe alder is the harder of the two. But wood densities can vary greatly. Agathis is in the pine family, so it would stand to reason that it's soft. The alder wood guitar bodies that I own don't seem that soft to me! Hope that helps.
Tables can be made from many different woods. I have an Oak coffee table and a Mahogany dining table.