MySQL Group By and Sum total value of other column

I have 2 columns like this:

+----------+--------+
|   word   | amount |
+----------+--------+
| dog      |      1 |
| dog      |      5 |
| elephant |      2 |
+----------+--------+

I want to sum the amounts, to get the result

+----------+--------+
| dog      |      6 |
| elephant |      2 |
+----------+--------+

What I have tried so far (and failed) is this:

SELECT word, SUM(amount) FROM `Data` Group By 'word'

Remove the single quote around the WORD. It causes the column name to be converted as string.

SELECT word, SUM(amount) 
FROM Data 
Group By word

It should be grave accent symbol not single quote:

SELECT word, SUM( amount )
FROM Data
GROUP BY `word`;

Output:

word     SUM(amount)
dog           6
Elephant      2

SELECT word, SUM(amount) FROM Data Group By word;