Synonyms for Douse:

n.

stamp out, splash, tackle, beat out, blow out, fight a fire/blaze. extinguish, drown out, mist, brush, quench, snuff out. submerse, enter. continue. douse (noun)
dowse, put out, drench, soak, sop, duck, souse, dunk, dip, plunge.
stream (noun)
sluice.

v.

drench, extinguish with liquid (verb)
quench, immerse, sop, blow out, saturate, deluge, splash, snuff out, dunk, duck, souse, submerse, put out, drown, wet, plunge, slosh, soak, submerge.
flood (verb)
drench, slosh, imbue, sluice, soak, rinse, swamp, saturate, deluge, shower.
immerse (verb)
bathe, sink, drown, dunk, flood, plunge, inundate, wallow, engulf, immerse, dip, submerge.
motion (verb)
duck, dip.
weather (verb)
put out.

Other synonyms:

submerse, extinguish. snuff out, quench. stamp out, wet, blow out. sodden, beat out. tackle, mist. brush. wet
wet.
Other relevant words:
duck, souse, submerse, sodden, dowse, stamp out, splash, mist, snuff out, tackle, quench, extinguish, put out, wet, sop.