The term MORSE SOUNDS THAT CAN SPELL 'HIES' can be solved by the four letter word DITS. In Morse code, dits are short beeps or clicks that represent the letter 'd' and are used to spell out words. The combination of dits and dahs (longer beeps) can be used to spell out words in Morse code. In this case, the combination of dits that can spell out the word 'HIES' is ....---..., which is the Morse code for the word 'HIES'.