Amnesia 
To dream that you suffer from amnesia signals that you are attempting to ignore some flaw in yourself and that you fear moving in a new direction.
Canteen
To dream of a canteen implies that you prefer to select simple methods of mental satisfaction rather than expending too much energy.
Derrick
To dream of derricks signifies roadblocks in your path to accomplishment.
Hydrant
To dream of a hydrant mostly indicates openness to a brand new start. On the other hand, dreams of a bursting fire hydrant refer to an explosion of suppressed emotions.
Such things are usually due to stress or long-term repression of feelings. Your dream may serve as a warning from your subconscious that you need to express your thoughts and emotions before it's too late.
Leaving
To dream of leaving indicates that you are unhappy with a situation or with someone in your life. You may be having problems at work and be in need of a change.
Alternatively a dream of leaving may simply represent a need for a break or a change of pace. You may feel that you would like to try new things, to embark on a new path, or to spend more time alone and away from the hustle and bustle of your usual responsibilities.
Welfare
To dream of being on welfare indicates that you feel rescued and cared for by someone other than yourself. You may have a strong family or group of friends who you know will be there for you in times of trouble.
Alternatively, a dream in which you are ashamed to be on welfare may indicate a fear of judgment from others or a fear of failure.
Ice Pick
To dream of seeing an ice pick indicates suppressed cold feelings and the desire to change the coldness.
Knapsack
To dream of a knapsack represents your ambitions, wishes, and kept secrets. It also symbolizes the emotional baggage, concerns, and obligations that are weighing you down.
Laxative
To dream of a laxative symbolizes the need to release yourself from the emotional hurt you have been nursing. It also means you have to let go of doubts and suspicions. Purify your body and soul.
Mattress
To dream of a mattress implies that you should concentrate on certain obligations for the near future.
To dream that you are sleeping on a new mattress indicates that you are comfortable and satisfied with your current situation.