Reducer and Slimmer

Reducer noun - A substance capable of bringing about the reduction of another substance as it itself is oxidized; used in photography to lessen the density of a negative or print by oxidizing some of the loose silver.

Slimmer and reducer are semantically related. In some cases you can use "Slimmer" instead a noun "Reducer".

Reducer and slimmer are semantically related. You can use "Reducer" instead a noun "Slimmer".