Definition of vociferous:
conspicuously and offensively loud; given to vehement outcry
Synonyms of vociferous:
blatant, clamant, clamorous, strident, obstreperous, strident, noisy, boisterous
Opposite/Antonyms of vociferous:
quiet, diffident, bashful, meek, gentle, hushed, demure, cautious, tranquil
Sentence/Example of vociferous:
The crowd at the Halton Stadium can be a vociferous lot anyway, so we will have to be on our mettle.