effusion

noun

1 a massive effusion of poisonous gas from a volcanic lake:

outflow, outpouring, outflowing, outrush, rush, current, flood, deluge, emission, discharge, issue;

spurt, surge, jet, fountain, cascade, spout, stream, torrent, gush, outburst, flow, flux, welling, leakage, escape, voidance, drain, drainage, outflux, emanation, effluence, exudation;

technical efflux.

2 (usually effusions) newspaper reporters' flamboyant effusions:

outburst, outpouring, gush, stream of words, flow of speech;

utterance, wordiness, speech, address, talk, words, writing(s);

informal spiel, verbiage.

effusion Oxford Dictionary of English