BIVALENCE
BIVALENCES
BIVALENCIES
BIVALENCY
BIVALENT
BIVALENTS
BIVALVATE
BIVALVE
BIVALVED
BIVALVES
BIVALVULAR
BIVARIANT
BIVARIANTS
BIVARIATE
BIVARIATES
BIVIA
BIVINYL
BIVINYLS
BIVIOUS
BIVIUM
BIVOUAC
BIVOUACKED
BIVOUACKING
BIVOUACKS
BIVOUACS
BIVVIED
BIVVIES
BIVVY
BIVVYING

29 words start with BIV.