Cases of word usage

1) shortened form of a word (abbreviation)

2) a soluble substance (such as soda, potash, ammonia) that combines with acids to form salts (alkali)

3) a form of poetry for speaking or singing that tells a story (ballad)

4) used with the present participle of another verb to form the continuous tenses (be)

5) (of water etc) at a temperature when bubbles form (boiling)

6) a non-metallic element (symbol C) that occurs in all living matter, in its pure form as diamonds and graphite and in an impure form as coal and charcoal (carbon)

7) to form (something) by cutting away material from a piece of wood or stone (carve)

8) the form taken by an insect (e.g. a butterfly) between the time when it creeps or crows (as a larva) and the time when it flies (chrysalis)

9) in the form of the spiral-shaped part of the inner ear (cochlear)

10) (an example of) a form of drama dealing with everyday life in a humorous way and with a happy ending (comedy)