tranquillise

Verb

make calm or still
cause to be calm or quiet as by administering a sedative to
Alternative spelling of tranquilize.

Synonyms

calm, calm down, lull, quiet, quieten, sedate, still, tranquilize, tranquillize

Antonyms

Scrabble Score: 21

tranquillise: valid Scrabble (US) TWL Word
tranquillise: not valid in Scrabble (MW) Merriam-Webster Dictionary
tranquillise: valid Scrabble Word in International Collins CSW Dictionary

Words With Friends Score: 25

tranquillise: valid Words With Friends Word