Compare означает сравнивать, сверять. Другие однокоренные слова - это:
comparable - сравнимый
comparably — сравнительно
comparative - сравнительный
comparison — сравнение

Присмотримся поближе только к двум словам из этой группы: compare и comparison. Прочитайте внимательно все правила, обращая особое внимание на примеры. Запомните их.

We use each to talk about two or more people or things. We use every to talk about three or more. (Instead of 'every two' we say both).

We say each when we are thinking of people or things separately, one at a time. We say every when we are thinking of people or things together, in a
group. (Every is closer to all.)

Compare:

• We want each child to develop in his or her own way. We want every child to be happy.
  
• Each person in turn went to see the doctor. He gave every patient the same medicine.
  
  

The difference is not always very great, and often both words are possible.

• You look more beautiful each/every time I see you.