The word would be sane.
A seven letter word that means a high shrill sound would be "whistle".
Oink.
An 8 letter word for booms is thunders.As in "the sound thunders through the valley".
screech
To be mentally healthy and sound, is to be sane!
Sung
sane
The word would be sane.
The best word to use to describe someone who is mentally healthy and sound is stable. This means that they are sane and sensible and not likely to fail.
That would be "sane".
sane
sound
Sane means mentally healthy or sound.It comes from the Latin word sanus, and came into common use around 1721. At one time, it was also used to describe a healthy body, but now almost exclusively refers to the mind.
think
3 letter word for healthy club is "Gym"
One such word is sanity. also, insane = seriously mentally ill sane = mentally healthy and able to think in a reasonable way