Unscrambling the letters in THEM makes 13 valid words. Here is the full breakdown — longest words, top Scrabble scores, and every word grouped by length (highest-scoring first).
13total words
METHlongest (4 letters)
METHtop score (9 pts)
1 / 3vowels / consonants
Word lengths: 4-letter (2), 3-letter (5), 2-letter (6).