sp

Initial/Medial position(首/中):span, spank, spam, spasm, spat, spatter, sparrow, spatula, Spain, spade, space, spacious, spare, sparing, spa, sparse, spark, sparkle, spaghetti, spell, spend, speck, speckle, spectacle, special, specimen, spectacular, specify, speculate, spectator, spectrum, speed, speech, speak, spear, species, specific, spit, spin, spindle, spill, spiel, spirit, spinach, spice, spine, spider, spike, spire, spiral, spot, spotlight, sponge, sponsor, spontaneous, spoil, spoke, sports, spouse, spout, spoon, spool, spoof, spooky, spud, spun, sputter, spur, spurt, spry, spy, aspire, perspire, spew

Final position(尾):gasp, grasp, clasp, hasp, rasp, wasp, wisp, lisp, crisp