spoonerism

n (often humorous) result of changing round, esp accidentally, the initial sounds of two or more words when speaking, eg well-boiled icicle for well-oiled bicycle （常产生滑稽效果的）首音误置（如将 well-oiled bicycle 说成 well-boiled icicle）.

sponge-bag, sponge-cake, sponge-pudding, sponger, sponginess, sponging, spongy, sponsor, sponsorship, spontaneity, spontaneous, spontaneous combustion, spontaneously, spoof, spook, spookiness, spooky, spool, spoon, spoon-feed, spoonful, spoor, sporadic, sporadically, spore, sporran, sport, sportily, sportiness, sporting, sportive, sportively, sportiveness, sports car, sports jacket, sports writer, sports-editor, sportscast, sportsman, sportsmanlike,