1) Allay 2) Pacify 3) Quash 4) Quiet 5) Stifle 6) Subdue 1) Conquer 2) Curb 3) Exclusively Anglo word 4) Exclusively Saxon word 5) Inhibit 6) IOS game 7) Overcome or allay 8) Pacify 9) Put an end to 10) Put down 11) Put down forcefully 12) Put down forcibly 13) Quench 14) Silence 15) Squelch 16) Stamp down 17) Subdue 18) Suppress 19) Suppress or crush completely 
• (n.) Murder. • (v. i.) To be subdued or abated; to yield; to abate. • (v. t.) To take the life of; to kill. • (v. t.) To quiet; to allay; to pacify; to cause to yield or cease; as, to quell grief; to quell the tumult of the soul. • (v. i.) To die. • (v. t.) To overpower; to subdue; to put down.Quell: words in the def...
Quell intransitive verb [ imperfect & past participle Quelled ; present participle & verbal noun Quelling .] [ See Quail to cower.] 1. To die. [ Obsolete] « Yet he did quake and quaver, like to quell .»...Quell noun Murder. [ Obsolete] Shak. Quell transitive verb [ Middle English quellen to kill, Anglo-Saxon cwellan , causative of cwelan to die; akin to Old High German quellen to torment, Icelandic kvelja . See Quail to cower.] 1. To take the life of; to kill. [ Obsolete] Spenser....
suppress subdue 
[v] - overcome or allay
to suppress; put an end to; extinguish: The troops quelled the rebellion quickly. · to vanquish; subdue. · to quiet or allay (emotions, anxieties, etc.): The child's mother quelled his fears of the thunder.
[SAT terms] suppress or crush completely suppress or crush completely suppress or crush completely suppress or crush completely[Lexical terms] overcome or allay