1) Appease 2) Appease or soothe 3) Appease, mollify 4) Assuage 5) Calm 6) Calm down 7) Conciliate 8) Gain the good will of 9) Gentle 10) Give a sop to 11) Gruntle 12) Lenify 13) Lull 14) Mollify 15) Pacify 16) Proffer a soft answer 17) Put a T in soothe 18) Quiet 19) Quiet the anger of 20) Quieten 21) Soothe 1) Appease 2) Assuage 3) Conciliate 4) Gruntle 5) Lenify 6) Mollify 7) Pacify 8) Resolve 9) Soothe 
• (n.) Same as Placard, 4 & 5. • (v. t.) To appease; to pacify; to concilate.
Pla'cate transitive verb [ imperfect & past participle Placated ; present participle & verbal noun Placating .] [ Latin placatus , past participle of placare to placate, akin to placere to please. See Please ...Plac'ate noun Same as Placard , 4 & 5. 
soothe pacify calm 
[ASVAB glossary] cause to be more favorably inclined[SAT terms] cause to be more favorably inclined cause to be more favorably inclined[Intelligent words] cause to be more favorably inclined