noun

a change which is a result or consequence of an action or other cause.

the lethal effects of hard drugs

result,consequence,upshot,outcome,out-turn,sequel,reaction,repercussions,reverberations,ramifications,end result,conclusion,termination,culmination,denouement,corollary,concomitant,aftermath,footprint,fruit(s),product,by-product,sequelae,pay-off,issue,success

verb

cause (something) to happen; bring about.

the prime minister effected many policy changes

achieve,accomplish,carry out,succeed in,realize,attain,manage,bring off,carry off,carry through,execute,conduct,fix,engineer,perform,do,perpetrate,discharge,fulfil,complete,finish,consummate,conclude,cause,bring about,cause to happen/occur,initiate,put in place,create,produce,make,give rise to,provoke,call forth,occasion,bring to pass,generate,originate,engender,precipitate,actuate,wreak,kindle,effectuate