Question

Agoraphobia is a fear of open spaces. Claustrophobia is a fear of closed-in spaces. Knowing this, you can conclude that the Greek-based suffix phobia probably means

a. "fear."
b. "open."
c. "spaces."
d. "closed-in."

Answer 1

Phobia means a. fear

Answer 2

Since the words you provided for us is all about fearing something or having anxiety / afraid, this brings to a conclusion that phobia means fear. There are still other words that is related to those of yours. Trypophobia, homophobia, xenophobia and many many more.