fa-step-forward icon in font awesome icons has 1 variant fas i.e.,solid.
fa-sticky-note icon in font awesome icons has 2 variants regular (far) and solid (fas)
fa-stop-circle icon in font awesome icons has 2 variants regular (far) and solid (fas)
fa-store-alt icon in font awesome icons has 1 variant fas i.e.,solid.
fa-store-alt-slash icon in font awesome icons has 1 variant fas i.e.,solid.
fa-stream icon in font awesome icons has 1 variant fas i.e.,solid.
fa-subway icon in font awesome icons has 1 variant fas i.e.,solid.
fa-surprise icon in font awesome icons has 2 variants regular (far) and solid (fas)
fa-swimmer icon in font awesome icons has 1 variant fas i.e.,solid.
fa-swimming-pool icon in font awesome icons has 1 variant fas i.e.,solid.