Nightingale 
To dream of a singing nightingale denotes an attractive and wholesome environment. To dream of a silent nightingale means a spat among friends most likely due to miscommunication.
Ouija Board
To dream of an Ouija board bodes of failure in a relationship or state of affairs. It may also indicate successive disappointment in what you have planned.
Dreaming of a non-functioning Ouija board embodies difficulties caused by prioritizing pleasures over work and goals.
Outer Space
To dream of outer space suggests the sudden appearance of something or someone out of nowhere.
Pocketknife
To dream of a pocketknife hints of a friend who is reticent to show his true feelings for you.
Post Office
To dream you are in a post office suggests that your inner self or subconscious is telling you something of importance. It may be in relation to getting in touch with someone. It may also mean reinforcing what you believe in.
Power Lines
To dream of seeing or being entangled in power lines portrays your strive to gain power. There is a hindrance either in your relationship or profession.
Rattlesnake
To dream of a rattlesnake symbolizes your life journey and the passage of time.
Rolling Pin
To dream of using a rolling pin denotes creative talents and high morale which makes you productive and optimistic in your dealings.
To dream that you are using a rolling pin as a weapon represents your swift decision making and temperamental nature.
Rubber Band
To dream of a rubber band denotes a need to be more flexible in your dealing with others. You need to stretch the way you react, imagine, or conceptualize plans.
To see a rubber band snap signifies that you are overburdened. You have overstretched yourself.
Screwdriver
To dream of a screwdriver signifies your desire to repair a damaged situation or relationship. It may also represent a person in your life who needs your help to deal with certain issues.