1. Arithmophobia – Fear of Numbers.
2. Hullabaloo – The loud noises and shouting that people make when they’re angry.
3. Plutophobia – Fear of Money.
4. Cacophony – A mixture of horrible sounds.
5. Xanthophobia – Fear of the color yellow. 
6. Ragamuffin – A person, typically a child, in ragged, dirty clothes.
7. Ablutophobia – Fear of bathing.
8. Curmudgeon – A bad-tempered person, especially an old one.
9. Optophobia- The fear of opening one’s eyes.
10. Flummox – To perplex (someone) greatly; bewilder.
11. Globophobia – Fear of balloons.
12. Woebegone – Sad or miserable in appearance.
13. Hippopotomonstrosesquippedaliophobia – Fear of long words.
14. Frankenfood – A genetically modified food.
15. Ephebiphobia – Fear of adolescents.

Cites:

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

https://www.fluentu.com/blog/english/weird-strange-english-words/

Picture:: https://mainelydiy.com/wacky-words/