Reactants (can't be any more simple now can it?)
There is no chemical of that sort. The chemical general name for the substance which speeds up the reaction is known as a catalyst.
Reactants.
One or more products are formed in a chemical reaction.
The general term is "chemical reaction". There are sub-categories like "oxidation-reduction", "double (and single) replacement", and others.
A chemical produced from a reaction is usually referred to as the product of the reaction. While the initial chemicals are known as reactants.
Products, or intermediates. Products are the final compounds you are left with and intermediates may be new chemicals made through reaction which are then reacted themselves to form further intermediates or final products.
substance
The chemicals that result from a chemical reaction are called products. They are formed when reactants undergo a transformation during the reaction process. The reactants are the initial substances that participate in the reaction, while the products are the new substances produced.
a product
The substances at the start of a chemical reaction are known as reactants. Reactants are the molecules or compounds that undergo a chemical change during the reaction. They are typically written on the left side of a chemical equation, while the products of the reaction are written on the right side. The reactants are consumed during the reaction to form the products.
the name given to chemicals which react together is products
it`s a precipitate