In the following question, you will find four additional words provided as alternatives alongside a given word. One of these words cannot be formed using the letters of the given word. Identify that word.
Given word: "MATHEMATICS"

Let's count the available letters in MATHEMATICS: $\text{{M:2, A:2, T:2, H:1, E:1, I:1, C:1, S:1}}$.
* MATE: Consists of M, A, T, E (All available).
* THEM: Consists of T, H, E, M (All available).
* MATH: Consists of M, A, T, H (All available).
* MATTER: Requires the letter 'R', which is completely absent in the word "MATHEMATICS".

Hence, the word MATTER cannot be formed.