sound

fairly, pretty, quite, reasonably

The company's financial plan seems reasonably sound despite the current economic challenges.

structurally

The old bridge was declared structurally sound after the engineers completed their inspection.

absolutely, perfectly

The doctor said his heart was absolutely sound despite his age.

commercially, ecologically, environmentally, financially, ideologically, theoretically

The company's environmental policies are theoretically sound, but they lack proper implementation.

big, deafening, loud, powerful

The fireworks made a deafening sound that scared all the dogs in the neighborhood.

clean, clear, sharp

The piano in the concert hall had a beautiful clear sound that filled the entire room.

awful, horrible, sickening

The horrible sound of breaking glass made everyone jump in fear.

distant

We could hear a distant sound of traffic from the highway while we sat in the garden.

guitar, piano, etc.

The old piano sound in that concert hall was surprisingly warm and rich.

emit, make, produce, pronounce, transmit, utter

The old wooden floorboards emitted a loud creaking sound whenever anyone walked across them.

carry, travel

The music traveled across the empty hall and reached every corner of the theater.

come

Loud music came from the apartment next door late last night.

bite

The news report included a sound bite from the president's speech about the economy.

at the ~ of

The dog jumped up at the sound of the doorbell ringing.

without a ~

The thief crept through the house without a sound, careful not to wake anyone sleeping upstairs.

~ of

She woke up to the sound of rain pattering against the bedroom window.

~ from

We could hear loud music sound from the neighbor's apartment last night.

turn down/up

I had to turn the sound down because the movie was too loud.

system

The movie theater installed a new sound system that made every action scene incredibly powerful.