Agateophobia 

Fear of Insanity or at least somewhat going or have already gone insane

Agateophobia is having a fear of going insane or repeating the insanity process until you die

also known as Maniaphobia.

Agateophobia by Miki_Owari February 25, 2010

Agapophobia 

Fear of falling in love (agape).

A: Yo, what happened with you and that girl who won't see you one-on-one because of that one time you let her down.

B: Nothing; it's been so long now, I think she's got agapophobia.

Agapophobia by E_incognitio December 20, 2010

Amathophobia 

This is an uncommon fear of dust.

Person 1: AHH! There's dust floating in the air!!!
Person 2: Oh, get over it. I'm sick of your Amathophobia.

Amathophobia by Phobiaz July 22, 2008

ageophobia 

hatred, prejudice, fear or loathing of the older generation

Millennial: Your views are outdated, all you oldies are dying off, the world belongs to the young.
Boomer: Wow, a new age cyber bully (pun intended). Looks like you millennials have this ageophobia thing down pat

Millennial: What would you know about anything? You're probably too old to remember you address.
Boomer: Way to go with ageophobia, you bigot.

ageophobia by Fred Eyre March 17, 2019