Cases of word usage

1) (kinds of) very small living things, many of which cause disease or help dead animals and plants to decay (bacteria)

2) the decay (of bones or teeth) (caries)

3) the decay of a part of the body because the supply of blood to it has been stopped (gangrene)

4) earth formed by the decay of dead leaves, plants etc (humus)

5) that cannot decay or be destroyed; a person who cannot be corrupted, especially by being bribed (incorruptible)

6) mother; a dead body preserved from decay by using certain chemicals etc (mummy)

7) a flat metal or stone plate fixed on a wall as a memorial; the yellow substance that forms on the teeth and causes decay (plaque)

8) (to cause meat etc) to decay (the usual word) (putrefy)

9) the condition of being bad; nonsense; (to cause something) to decay (rot)

10) very small indication of some bad smell, decay etc; to make (a person) morally bad (taint)