tranquilize vs tranquillise

tranquilize and tranquillise both are verbs.

Word	Noun	Adjective	Verb	Adverb
tranquilize	No	No	Yes	No
tranquillise	No	No	Yes	No

As verbs, tranquilize and tranquillise are synonyms defined as:

tranquilize and tranquillise: cause to be calm or quiet as by administering a sedative to

Other synonyms of tranquilize include calm, sedate, tranquillize.

As verbs, tranquilize and tranquillise are synonyms defined as:

Other synonyms of tranquilize include calm, calm down, lull, quiet, quieten, still, tranquillize.

tranquilize (verb)	tranquillise (verb)
cause to be calm or quiet as by administering a sedative to	cause to be calm or quiet as by administering a sedative to
make calm or still	make calm or still