Corn 
To see corn in your dream represents prosperity, development, and productivity. It may be a play on the word 'corny.' Perhaps some experience or matter in your life seems silly or doesn't make sense.
Corner
To dream that you are in a corner indicates that you feel unable to manage the different aspects of your life. You are confused and unsure of what to do next. Perhaps you feel as if you have no options or alternatives.
Cornucopia
To dream of a cornucopia symbolizes wealth, accomplishment, and success. The dream also suggests the balance and harmony between male and female qualities.
Boiler
To dream of a boiler means rising stress levels or losing your temper in waking life. Your subconscious mind is showing you a boiler in order to indicate your current emotional status.
Popcorn
To dream of popcorn indicates that you possess a very creative nature. It may also indicate awareness of new truths and facts.
Demeter
To dream of Demeter is a powerful sign of impending marriage, possibly of someone close to you. There is also the likelihood of a fertile season ahead for you and your loved ones.
Marshmallows
To dream of marshmallows symbolizes vulnerability and shyness. You should express your opinions and thoughts more aggressively.
To dream that you are roasting marshmallows implies personal fulfillment and determination. ,
- 1