1. Submechanophobia- the fear of man-made things submerged underwater
2. Tittle- the dot above “i” and “j”
3. Vantablack- the world’s darkest shade of black
4. Arachibutyrophobia- fear of peanut butter sticking to the roof of your mouth
5. Nomophobia- fear of being without your mobile phone
6. Arithmophobia- fear of numbers
7. Plutophobia- fear of money
8. Biblioklept- someone who steals books
9. Acnestis- the part of your back that you can’t scratch
10. Meldrop- a small runny nose
11. Octothorpe- the symbol #
12. Nauseant- something that induces nausea
13. Obelus- the symbol ÷
14. Agelast- a person who never laughs
15. Peristeronic- relating to pigeons

Cites:

https://www.therecoveryvillage.com/mental-health/phobias/related/weird-phobias/

https://www.merriam-webster.com/words-at-play/surprising-uncommon-words