catalyst

/ˈkæt.əl.ɪst/noun

A substance that speeds up a chemical reaction while remaining unchanged itself.

Example sentence

“The enzyme acts as a catalyst, making the reaction happen much faster.”

Widely used outside chemistry for any person or event that triggers change: 'a catalyst for reform'.

Related words

catharticHelping to release built-up emotions, especially after something overwhelming.cashierA person whose job is to take payments from customers at a register.cautiousActing carefully to avoid danger or mistakes.cashPhysical money, meaning coins and paper bills, rather than cards, checks, or digital payments.caveA big natural hollow space underground or in the side of a cliff or hill.cascadeA waterfall, or a chain of small waterfalls flowing one after another.