Freak

1. a very unusual and unexpected event or situation.

2. a person, animal, or plant with an unusual physical abnormality.

1. (Informal)
behave or cause to behave in a wild and irrational way, typically because of the effects of extreme emotion, mental illness, or drugs.

2. (Archaic)
fleck or streak randomly.

1. (Informal)
"I could have freaked out and started smashing the place up"

2. (Archaic)
"the white pink and the pansy freaked with jet"

pseudonym

a fictitious name, especially one used by an author.

"I wrote under the pseudonym of Evelyn Hervey"