Words that can be made with the letters 'datecay' are:
Call Letters
The structure is that the letters for a word are mixed up. You then need to use all of the letters and rearrange the letters to spell a word.
You can use all seven letters to make the word catlike.
You can use the letters to spell the word display. You also can spell sassily.
The three letter word you can make is ale. You can also make the word key
You use capital letters only if it is a place. Also you use it to capitalize your first word of a sentence.
The word you can make with the letters "onrestc" is "sterc." However, if you meant to use all the letters, the correct word is "cornets."
you use letters
Key
There is no English word that meets the criteria.
If you are referring to sets of letters, then yes. But if you are referring to individual letters, they are called letters, not alphabets.
When it describes a noun. "Block" letters are plain capital letters.