silicon; silicone (oxidized form)
disclosure; exposure; revelation
copper (Cu); bronze (medal)
element; chemical element; (classical) element (e.g. earth, water, air, fire); (arch.) origin; (arch.) source
silver (Ag); silver coin; money; silver medal; silver colour; silver color; bank
to be at wits' end; to be greatly perplexed; to be troubled
to begin to write; to start writing; to write out (e.g. on a blackboard); to extract (and write down); to write down (the important parts); to export
numerator; molecule; member; element
chemical reaction; generation of an unexpected result from combining things
neutrality (incl. chemical, electrical, etc.); indifference; sexlessness; androgyny; neuter gender
laws of nature; physical laws; physics
energy; energy; strength; energy source; energy resource; food energy
learning; scholarship; study; study of ...; -ology; -ics
fluid mechanics; fluid dynamics; hydrodynamics
magnetism; magnetic force