Bacteria and Reactants

Bacteria noun - (microbiology) single-celled or noncellular spherical or spiral or rod-shaped organisms lacking chlorophyll that reproduce by fission; important as pathogens and for biochemical properties; taxonomy is difficult; often considered to be plants.

Reactants and bacteria are semantically related. In some cases you can use "Reactants" instead a noun "Bacteria".

Bacteria and reactants are semantically related. Sometimes you can use "Bacteria" instead a noun "Reactants".