reverberant
assertive
boom
booming
consonant
deafening
ear-piercing
ear-rending
ear-splitting
earthshaking
echo
echoic
echoing
forceful
forte
fortissimo
full
growl
growling
grumble
grumbling
insistent
lingering
loud
loud-sounding
loudish
orotund
pealing
persistent
piercing
plangent
reboant
reboation
rebound
rebounding
reecho
reechoing
repercussive
resonant
resound
reverberating
reverberation
reverberatory
ringing
rotund
round
rumble
rumbling
sonorous
sounding
abounding
astounding
bounding
compounding
confounding
expounding
founding
grounding
hounding
impounding
pounding
rounding
surrounding