1 to kill germs

2 to disinfect

3 to sterilize

1 a disinfectant

1 vaccine

1 harmful bacteria

2 pathogenic bacteria

3 germs

1 bacterium

2 germ

1 to compete with (idiom) (Tw)

2 to pit oneself against

1 to spoil things through excessive enthusiasm (idiom)

1 puffball (mushroom in the division Basidiomycota)