doublet

n 1 (formerly) short close-fitting jacket worn by men, with or without sleeves （旧时）男用紧身上衣或背心. 2 either of a pair of similar things, esp one of two words with the same origin but a different form or meaning, eg hospital/hostel 一对类似的东西中的一个; （尤指同源异形或异义的）双式词, 如hospital/hostel.

double-bass, double-book, double-booking, double-breasted, double-check, double-cross, double-dealer, double-dealing, double-decker, double-dyed, double-edged, double-faced, double-glaze, double-glazing, double-jointed, double-park, double-quick, double-stop, double-talk, double-think, doubly, doubt, doubter, doubtful, doubtfully, doubting Thomas, doubtless, douche, dough, doughnut, doughty, doughy, dour, dourly, douse, douse (also dowse), dove, dovecote, Dover, dovetail,