| A | B |
| diametrical | pertaining to diameter-opposite extremes |
| substantiate | to prove |
| dialogue | conversation between two or more people |
| subsequent | following or taking place later |
| ambition | strong desire to succeed |
| ambidextrous | amble to use both hands equally well |
| surfeit | overindulgence |
| subvert | to overthrow something such as a government |
| diagonal | slanting line coneecting opposite corners |
| ambiguous | two or more possible meanings |
| surcharge | a extra charge |
| ambivalent | feelings of not knowing which to choose |
| subconscious | part of the automatic thinking process |
| surrender | to give in |
| ambulatory | the ability to walk or be mobile |
| surveillance | watching throw cameras or unknow awareness |