You can use your word software to print applique alphabets. Just type out the letters/words you want. Highlight them and then change the font size. You are not limited by the default sizes. Just type in a number like 50 or 100 or larger and print.
Try typing the alphabet in upper and lower case and then highlighting it and pointing to the different font names you can see what the letters look like.
Also Google free fonts and you can add to your font library.