Blackness, blackout
darkness
Synonyms for the time could be evening or darkness. The noun conjunct "night" could have the synonyms nocturnal, dark, or late.
Heavily shaded Ebony, or ebon Sometimes inky, with the implication that the darkness is impenetrable or completely black.
They are synonyms.
Synonyms
Relative and kin are synonyms.
Twilight and dusk are often used interchangeably to refer to the period of time between daylight and darkness. However, twilight technically refers to the period when the sun is below the horizon but there is still residual light, while dusk specifically refers to the period just before nightfall when the sky is darkening. So they are more closely related than they are opposites.
They are synonyms.
synonyms
Are there synonyms for washable
Synonyms for Brake:AnchorBlockConstraintDecelerateDeterrentHaltHindranceObstacleRestraintStop
Synonyms for Brash:ArrogantBoldBrazenCheekyCockyDisrespectfulFlagrantHastyHotheadedImpulsiveMadcapRudeTactlessThoughtlessUntactful