nuclei
the answer to level is 12 but you have to spell it in letters.
Words that you can spell with 'rlegitho' ending with T are:eightgetgiltgrithilthititletlightlitrelightrightriotrot
"BIOTRON"
The letters spell the 7 letter word askance. They do not spell a 7 letter word starting with s and ending with e.
These letters can be unscrambled to spell the word greatest.The next longest word possible is targets.
Those letters spell natural.
There is no one-word anagram. The letters can spell a large numbe of phrases such as "nil Centigrade" or "tried cleaning" or "article ending."
The letters in "these letters" can spell the phrase "ether settles." The letters can spell shorter words such as trestles, sheerest, shelters, and treeless.
Those letters will spell dollar.
The letters spell 'broccoli'.
Those letters spell psycho.
Those letters will spell carnivore.