Synonyms for «major reason»

main important principal primary chief leading big key huge prime significant whole top large strong several great common different basic good medical public various much minor likely real fundamental popular possible specific health numerous business compelling general driving multiple central final serious deciding potential wide underlying safety essential covered

rationale purpose motive factor explanation justification causes motivation argument decision problem part motivator way advantage force answer concern number majority lot basis source choice people interest behavior point success effect host idea goal variety list influence benefit plenty couple exception issue request objection consideration change claim question need constraint