As a means, aiming to, and as a means to are all synonyms for that. Which and this are antonyms of that. And here are 58 another word for that.
The conjunction "that" has a variety of synonyms that differ in length. 3 synonyms with 2 letters, 1 synonym with 3 letters, 1 synonym with 4 letters, 3 synonyms with 5 letters, 4 synonyms with 6 letters, 2 synonyms with 7 letters, 5 synonyms with 8 letters, 1 synonym with 9 letters, 4 synonyms with 10 letters, 7 synonyms with 11 letters, 5 synonyms with 12 letters, 4 synonyms with 13 letters, 3 synonyms with 14 letters, 3 synonyms with 15 letters, 2 synonyms with 16 letters, 3 synonyms with 17 letters, 3 synonyms with 18 letters, 1 synonym with 20 letters, and 1 synonym with 23 letters, for a total of 56 synonyms for that.
She said that he would arrive soon.
I believe that we can achieve this.
They know that it is a problem.
He thinks that she might be right.