kept up (verb) keep up: maintain, sustain
Sinonime: beating, booming, clangorous, consonant, deep, deep-toned, earsplitting, echoing, electrifying, enhanced,
full, heightened, intensified,
loud,
mellow,
noisy, orotund, plangent,
powerful,
profound, pulsating, pulsing, resounding, reverberant, reverberating,
rich, ringing, roaring,
round, sonorant,
sonorous, stentorian,
strident,
thrilling, throbbing, thundering, thunderous
Antonime: faint,
quiet