Minecraft wiki entry for Iron, associated text: Iron Ore − An ore found underground. Drops raw iron.
Deepslate Iron Ore − A variant found in the deepslate layer of the world.
Raw Iron − An item that drops from iron ore when mined; it can be smelted into iron ingots.
Iron Ingot − An item created by smelting raw iron, used for crafting tools, weapons, etc.
Iron Nugget − An item obtained by smelting iron tools, weapons, or armor in a furnace. It can also be gotten from bartering. Fill a crafting table with it to make an iron Ingot.
Block of Raw Iron − A block used for compact raw iron storage.
Block of Iron − A block used for compact iron storage, to spawn iron golems, and to create the base/pyramid for a beacon.
Iron Bars − A block similar to glass panes but is more blast-resistant.
Iron − An element included in the Bedrock Edition and Education Edition.
Iron Trapdoor − A trapdoor that has to be activated by redstone like iron doors.
Iron Door − A door that has to be activated by redstone like iron trapdoors.
Activator Rail − A type of rail that can "activate" certain minecarts.
Blast Furnace − A block that smelts ores, raw metals, iron armor, and tools, similar to a furnace, but at twice the rate. It also serves as an armorer's job site block.
Anvil − A block that allows players to repair items, rename items, and combine enchantments.
Cauldron − A block that can hold water, lava, and powder snow.
Chain − A metallic decoration block.
Detector Rail − A block that can transport minecarts and can be used as a switchable redstone power source.
Heavy Weighted Pressure Plate − Just like any other pressure plates, sends out a redstone signal around it if a player steps on it.
Hopper − A block that can be used to catch item entities, or to transfer items into and out of containers.
Minecart − A train-like vehicle entity that runs on rails.
Piston − A block capable of pushing blocks, players, and mobs when given a redstone pulse.
Sticky Piston − A block with the same function as a piston but can also pull the block on its face back when it retracts
Rail − A non-solid block that provides a path along which minecarts can travel.
Stonecutter − can be used to craft stone-related blocks in smaller and more precise quantities than crafting. It also serves as a stone mason's job site block.
Tripwire Hook − A block that can be used to detect entities (players, mobs, items, etc.) when part of a tripwire circuit is passed through. It can be used to make crossbows.