| A | B |
| insular | Limited in knowledge or perspective |
| insulate | To protect from outside influence |
| idiosyncracy | A peculiar quality; a quirk |
| idiom | Speech or phrase specific to a particular language or group of people |
| enumerate | To list separately; to count off |
| innumerable | So plentiful as to be uncountable |
| nonplussed | Baffled; confused |
| surplus | Amount beyond what is necessary |
| plurality | Greater part; majority |
| single | To isolate; to choose |
| singlular | Separted from others; unique |