This is the 6661st most frequent Russian word.
metal
Metal (металл) – a solid material that is typically hard, shiny, malleable, fusible, and conductive.
Here, 'металл' is used as a noun referring to the material from which the bridge is made.
Этот мост сделан из металла.
This bridge is made of metal.
In this sentence, 'металлические' is an adjective derived from 'металл,' describing the type of constructions.
Металлические конструкции нужны для создания прочных зданий.
Metal structures are essential for building sturdy buildings.
Here, 'металл' is used to represent the music genre known as metal.