secular, a. [temporal], [worldly], laic, [civil].
secure, a. [safe], [confident], assured, [fast], [immovable], [stable], indemnified. Antonyms: [insecure], [risky], [hazardous].
secure, v. [gain], [procure], [obtain], [get], acquire; [fasten], moor; [guarantee], ensure, [insure], assure, indemnify; [defend], [guard], [shield], [protect].
security, n. [safety], [confidence], [assurance], [certainty]; [warranty], [surety], indemnification, [pledge], [indemnity], [bond], [guarantee], vadium; [defense], [protection], [bulwark].
sedate, a. [staid], [demure], imperturbable, composed, [calm].
sedative, a. composing, [soothing], anodyne.
sedative, n. anæsthetic, [narcotic], [opiate], hypnotic.
sediment, n. precipitate, [dregs], lees, [settlings], [grounds], feculence.
sedition, n. [rebellion], [revolt], insurrection, [riot], [mutiny], insubordination.
seditious, a. [rebellious], insubordinate, [insurgent], [mutinous].