Intestines 
To dream of intestines represents unfortunate events leading to loss, failure, and adversity.
Levitation
To dream that you are levitating signifies that you are having difficulty letting go of your unconventional ideas. This may be a reminder for you to look at more realizable and feasible options.
Alternatively, you may be distancing yourself from your source of protection and rationality. It represents being alienated and uncared for by those around you.
Lighthouse
To dream of a lighthouse symbolizes your journey to seek guidance and enlightenment through trials and tribulations.
Understudy
To dream of being the understudy in a play or production is a sign that you are the only one standing in the way of a possible successful future. There is an implication that you may need to grow in confidence and put yourself out there a little more to achieve your ultimate success.
Electricity
To dream of electricity indicates the power created by life. You might require some recharging of your own batteries.
To dream that you have lost electricity suggests that you don't have the proper foresight or vision about a particular circumstance.
Mathematics
To dream about mathematics suggests that you are attempting to assess an issue and discover the best way to resolve it. You should use practical and sensible reasoning rather than your instincts and feelings.
To dream that you are unable to solve a mathematical problem or equation is a reflection of an issue that you are unsure about. This dream may be leading you towards a resolution.
Necromancer
To dream of a necromancer symbolizes the wicked perils that may possibly be performed by your queer contact.
*See Hypnotist.
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.