Made up words

1. Adultivity:
The state or condition of being an adult.
2. Banjoologist:
An expert in banjo based musical styles
3. Drunkening:
The process of becoming drunk, a gerund form of the pseudo-verb "To Drunken".
4. Screamapillar:
A caterpillar that screams nearly all the time, even as it sleeps. Without constant reassurement, it will die, and it is sexually attracted to fire. It is endangered and illegal to kill one, despite the fact that it is a menace
5. Nuisancefon:
Mock German, meaning a phone which causes distress

Source...