poltergeist /pōlˈ or polˈtər-gīst/

1. A mysterious invisible force asserted to throw or move things about
2. A noisy ghost

• unfriending
• unfriendlily
• unfriendliness
• unfriendlinesses
• unfriendly
• unfriends
• unfriendship
• unfriendships
• unfrighted
• unfrightened
• unfrock
• unfrocked
• unfrocking
• unfrocks
• unfroze
• unfrozen
• unfructuous
• unfruitful
• unfruitfully
• unfruitfulness
• unfruitfulnesses
• unfuelled
• unfulfilled
• unfumed
• unfunded