concubinage - adultery, bigamy, cuckoldry, fornication, free love, incest, monogamy, polyandry, polygamy
,
lean-looking - bony, flat, gangling, gaunt, gawky, lanky, lean, meagre, raw-boned, scraggy, scrawny, skeletal, skinny, spare, spidery,
unquestioning belief - blind faith, dotage, fondness, infatuation, wishful thinking ,
non-fat dry milk - butter, cheese, cream, curd, dairy products, margarine, milk, whey, yoghurt ,
air corps - air arm, air force, air service, corps, escadrille, flight, squadron, strategic air force, tactical air force, wing ,
hold the field - distance, leave behind, outdistance, overpass, pass, shoot ahead, surpass ,
decaying - decadent, decrepit, deterioration, dilapidated, effete, mouldy, putrid, seedy, shabby ,
directrix - airline, axis, beeline, chord, diagonal, diameter, direct line, edge, normal, perpendicular, radius, secant, segment, shortcut, side,
stride - abut on, aesthetic distance, amble, ambulate, ankle, barge, be based on, bear on, bestride, bowl along, bundle, career, clearance, clip, clop,
rebound - adaptability, backfire, backlash, backlashing, be reflected, be sent back, boom, boomerang, booming, bounce, bounce back, bounciness, bound, bound back, buoyancy,
lean-looking - bony, flat, gangling, gaunt, gawky, lanky, lean, meagre, raw-boned, scraggy, scrawny, skeletal, skinny, spare, spidery,
unquestioning belief - blind faith, dotage, fondness, infatuation, wishful thinking ,
non-fat dry milk - butter, cheese, cream, curd, dairy products, margarine, milk, whey, yoghurt ,
air corps - air arm, air force, air service, corps, escadrille, flight, squadron, strategic air force, tactical air force, wing ,
hold the field - distance, leave behind, outdistance, overpass, pass, shoot ahead, surpass ,
decaying - decadent, decrepit, deterioration, dilapidated, effete, mouldy, putrid, seedy, shabby ,
directrix - airline, axis, beeline, chord, diagonal, diameter, direct line, edge, normal, perpendicular, radius, secant, segment, shortcut, side,
stride - abut on, aesthetic distance, amble, ambulate, ankle, barge, be based on, bear on, bestride, bowl along, bundle, career, clearance, clip, clop,
rebound - adaptability, backfire, backlash, backlashing, be reflected, be sent back, boom, boomerang, booming, bounce, bounce back, bounciness, bound, bound back, buoyancy,

