Roget's Thesaurus

#211. Base

Nouns

base, basement; plinth, dado, wainscot; baseboard, mopboard; bedrock, hardpan [U.S.]; foundation etc. (support) 215; substructure, substratum, ground, earth, pavement, floor, paving, flag, carped, ground floor, deck; footing, ground work, basis; hold, bilge. bottom, nadir, foot, sole, toe, hoof, keel, root; centerboard.

Adjectives

bottom, undermost, nethermost; fundamental; founded on, based on, grounded on, built on.