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 eg:He was killed in the accident.

3. amount, number

amount后接不可数名词;
number后接可数名词 eg: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. eg:My family is a happy one.