English, perhaps like every other language, has many words with identical or similar meanings. They are called synonyms.
Think of the words, approximately and about. As synonyms, you can choose either word in most cases, so my advice is to choose the simpler of the two.
Here is an example paragraph of simple words (in brackets) that could be used instead.
There are numerous (many) words that are synonyms and often you can choose the simple (easy) word over the complex (harder) word. Doing this help