Bacillus and Bacteria

Bacillus noun - Aerobic rod-shaped spore-producing bacterium; often occurring in chainlike formations; found primarily in soil.

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

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.

Bacillus and bacteria are semantically related in germ topic. You can use "Bacillus" instead a noun "Bacteria".