1). Complement vs Compliment To complement something means to supplement it. To compliment somebody means to praise them.
2). Pills vs Tablets Pills are small, round, and you take them orally. Tablets encompass all pills plus medicines of other shapes.
3). Dual vs Duel Dual means having two parts whereas a duel is a fight between two people.
4). Crocodile vs Alligator. This is a bit of a simplification, but crocodiles have v-shaped snouts and alligators have u-shaped snouts.
5). Effect vs Affect An effect is a change which is the result of an action, to affect something means to make a difference to it (an affect can have an effect)
6). Convince vs Persuade To convince someone is to make them believe something is true. To persuade them is to talk them into doing something.
7). Advise vs Advice To advise is to offer suggestions while advice is guidance offered with regard to prudent action.
Aid vs Aide Aid is assistance given. An aide is someone who assists (an aide gives aid).
9). Ascent vs Assent An ascent is an upward movement. To assent means to agree.
10). Amused vs Bemused If someone is amused then they are entertained. If they are bemused then they are bewildered.
Source: list25.com/25-confusing-word-pairs-that-seem-to-be-similar-but-arent/

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