Synonyms for Slake:

n.

satiety, if desired, on demand, satisfaction, content, sustenance. slake (noun)
assuage, quench, slack, abate, allay.

v.

change (verb)
slack.
decrease (verb)
allay, abate, assuage, appease, quench, gratify, satisfy, slack.
satisfy (verb)
fill, satisfy, stuff, engorge, allay, gratify, saturate, appease, glut, gorge, quench, satiate, sate.

Other synonyms:

satiety. sustenance. satisfaction. content. Other relevant words:
allay, content, abate, slack, assuage, satisfaction, satiety.

Usage examples for slake

  1. A large herd of buffalo now slake their thirst at the pool which supplied the villages of Ukamba with water. – How I Found Livingstone by Sir Henry M. Stanley
  2. And when Sir Launcelot felt a rough beard kissing him, he started out of the bed lightly, and the other knight after him, and either of them gat their swords in their hands, and out at the pavilion door went the knight of the pavilion, and Sir Launcelot followed him, and there by a little slake Sir Launcelot wounded him sore, nigh unto the death. – Le Morte D'Arthur, Volume I (of II) King Arthur and of his Noble Knights of the Round Table by Thomas Malory
  3. So you see this isn't a place for lazy and fanciful people- not a fortress of quiet, and still less a place for asses to slake their thirst! – Father Payne by Arthur Christopher Benson