Example 1:
My father cooks delicious meals on weekends.
Meaning:
Prepare food to be eaten by heating it following many ways.
Form: Verb
Example 2:
Question: What is your job?
Answer: I am a cook.
Meaning:
Someone who prepares food as a job or for pleasure.
Form: Noun
B. COOKER:
Example :
I use an electronic cooker in the kitchen to save time.
Meaning:
A piece of equipment used for cooking.
Form: Noun