1. clothes, cloth, clothing

clothes 统指各种衣服,谓语动词永远是复数;
cloth 指布,为不可数名词;
clothing 服装的总称,指一件衣服用a piece of, an article of

2. incident, accident

incident 指小事件;
accident 指不幸的事故,例:He was killed in the accident.

3. amount, number

amount 后接不可数名词;
number 后接可数名词,例:a number of students

4. family, house, home

home 家,包括住处和家人;
house 房子,住宅;
family 家庭成员,例:My family is a happy one.

5. sound, voice, noise

sound 自然界各种各样的声音;
voice 人的嗓音;
noise 噪音,例:I hate the loud noise outside.