For a reaction, synonyms could include automatic, reflexive, or instinctive. For a spontaneous person : impulsive, impetuous, or extemporaneous.
Adjective (of a device or process) Working by itself with little or no direct human control: "an automatic kettle that switches itself off". Noun An automatic machine or device, in particular. Synonyms automatical - self-acting - mechanical ~From google~
They are synonyms.
Synonyms
Relative and kin are synonyms.
They are synonyms.
synonyms
Are there synonyms for washable
Synonyms for Brake:AnchorBlockConstraintDecelerateDeterrentHaltHindranceObstacleRestraintStop
Synonyms for Brash:ArrogantBoldBrazenCheekyCockyDisrespectfulFlagrantHastyHotheadedImpulsiveMadcapRudeTactlessThoughtlessUntactful
There are no synonyms for pavement.
The synonyms for upon is on