Synonyms of underpinning

1 Syllable
base, root, prop
2 Syllables
support, buttress, basis, radix, stirrup, groundwork, footing
3 Syllables
buttressing, substratum, foundations, radicle, rhizome, fundament, radixes, caryatid, stiffener, flotations, radices, buttressed, strengthener, flotation, buttresses, foundation
4 Syllables
reinforcement, cosmologies, cosmology
5 Syllables
infrastructure