Bacillophobia- Fear of microbes.
Bacteriophobia- Fear of bacteria.
Ballistophobia- Fear of missiles or bullets.
Bolshephobia- Fear of Bolsheviks.
Barophobia- Fear of gravity.
Basophobia or Basiphobia- Inability to stand. Fear of walking or falling.
Bathmophobia- Fear of stairs or steep slopes.
Bathophobia- Fear of depth.
Batophobia- Fear of heights or being close to high buildings.
Batrachophobia- Fear of amphibians, such as frogs, newts, salamanders, etc.
Belonephobia- Fear of pins and needles. (Aichmophobia)
Bibliophobia- Fear of books.
Blennophobia- Fear of slime.
Bogyphobia- Fear of bogeys or the bogeyman.
Botanophobia- Fear of plants.
Bromidrosiphobia or Bromidrophobia- Fear of body smells.
Brontophobia- Fear of thunder and lightning.Bufonophobia- Fear of toads