fa-birthday-cake icon in font awesome icons has 1 variant fas i.e.,solid.
fa-blind icon in font awesome icons has 1 variant fas i.e.,solid.
fa-book-dead icon in font awesome icons has 1 variant fas i.e.,solid.
fa-book-reader icon in font awesome icons has 1 variant fas i.e.,solid.
fa-border-style icon in font awesome icons has 1 variant fas i.e.,solid.
fa-boxes icon in font awesome icons has 1 variant fas i.e.,solid.
fa-broadcast-tower icon in font awesome icons has 1 variant fas i.e.,solid.
fa-burn icon in font awesome icons has 1 variant fas i.e.,solid.
fa-bus-alt icon in font awesome icons has 1 variant fas i.e.,solid.
fa-calendar-alt icon in font awesome icons has 2 variants regular (far) and solid (fas)