How many words can be made from spontaneous?

S P O N T A N E O U S

tone, net, pat, pet, pot, tones, pats, pets, tan, tans, sane, pone, note, spot, spat, pant, pants, notes, pots, tune, tunes, pane, panes, nap, naps, sap, tap, top, taps, tops, an, as, at, to, no