Here is the complete group of real words you can form with the letters in ISTHMUS, displayed in a straightforward format for easy confirmation.
Words You Can Make from ISTHMUS
3-letter words
- HIM8
- HIS6
- HIT6
- HUM8
- HUT6
- ISM5
- ITS3
- MIS5
- MUS5
- MUT5
- SIM5
- SIS3
- SIT3
- SSH6
- SUM5
- SUS3
- TIS3
- TUI3
- TUM5
- UMS5
- UTS3
4-letter words
- HIMS9
- HISS7
- HITS7
- HUMS9
- HUTS7
- ISMS6
- MISS6
- MIST6
- MUSH9
- MUSS6
- MUST6
- MUTS6
- SHIM9
- SHIT7
- SHUT7
- SIMS6
- SITS4
- SITU4
- SMIT6
- SMUT6
- SUIT4
- SUMS6
- THIS7
- THUS7
- TUMS6
- TUSH7
5-letter words
- MISTS7
- MUSTH10
- MUSTS7
- SHIMS10
- SHITS8
- SHUTS8
- SITUS5
- SMITH10
- SMUTS7
- SUITS5
- SUSHI8
6-letter words
- SMITHS11
7-letter words
- ISTHMUS12
The list above covers all words you can make from ISTHMUS. In total, it produces 60 workable words.