foundation

[1]	basis , base , substructure , understructure , underpinning , bottom , foot , basement , cellar
[2]	basis , base , fundamental , (underlying/fundamental) principle , grounds , groundwork , rationale , purpose
[3]	founding , base , fundament , establishment , instituting , foot , groundwork , institution , creation , substructure , understructure , origination , setting up , organizing , organization , inauguration , endowment
[4]	grounding
[5]	basis , base , fundament , groundwork , cornerstone
[6]	foundation garment
[7]	initiation , founding , institution , origination , creation , innovation , introduction , instauration