The two words are different, no doubt but, only at the normal level of thinking.
Science is a way of knowing the facts, laws and nature of things through material-experiments.
The experiments are such that, once the fact is revealed, any one can repeat it at different places with similar set-up to get same result. The present science has developed a lot. New facts have been established regularly. This development is such that, what we say is correct today becomes incorrect on the next day. Although science is a path to know the ultimate fact daily development changes the correct to incorrect and vice-versa.