What It Scores
THRIMSA is a valid word in the tournament list this site uses. Tile values only, before any premium square: 12 in Scrabble and 12 in Words With Friends. The letters break down as T1 H4 R1 I1 M3 S1 A1.
At seven letters this plays a whole rack, which is a bingo and worth 62 in Scrabble once the 50 point bonus lands.
Anagrams of THRIMSA (2)
Same letters, different order. Any of these plays the same tiles for the same score.
Words Made From The Letters In THRIMSA
194 shorter words come out of these tiles. On a board that matters more than the long play, because a short word on a premium square often beats a long one on plain squares.
6 letter words (11)
5 letter words (43)
AIRTHAIRTSAMIRSAMRITARISHARTISASTIRHAIRSHARIMHARMSHARTSIHRAMMAIRSMAISTMARSHMARTSMATHSMIHASMIRTHRAITSRAMISRATHSSAITHSHARTSHIRTSIMARSITARSMARTSMITHSTAIRSTRIASTRIMTAHRSTAISHTAMISTARSITHAIMTHARMTHARSTIARSTRAMSTRASHTRIMS
4 letter words (72)
AHISAIMSAIRSAIRTAITSAMIRAMISARISARMSARTIARTSHAIRHAMSHARMHARTHASTHATSHIMSHISTHITSITASMAIRMARSMARTMASHMASTMATHMATSMIHAMIRSMISTRAHSRAISRAITRAMIRAMSRASHRASTRATHRATSRIASRIMARIMSRITSSAIMSAIRSARISATISHAMSHATSHIMSHIRSHRISIMASITHSMIRSMITSTARSTIMSTIRTAHRTAISTAMSTARSTASHTHARTHIRTHISTIARTRAMTRIMTSAR
3 letter words (50)
AHIAHSAIMAIRAISAITAMIARMARSARTASHATSHAMHASHATHIMHISHITISHISMITAITSMARMASMATMIRMISRAHRAIRAMRASRATRIARIMRITSAISAMSARSATSHASIMSIRSITSMASRITAITAMTARTASTIS
2 letter words (18)
Next: the Word Unscrambler for any letters at all. Full entry and definition at Merriam-Webster.