Answer:

hexa

Answer	Crossword Clue
HEXA	Six (comb. form)
HEXA	Numerical prefix
HEXA	Prefix with decimal

HEXA	Prefix with fluoride
HEXA	Twice tri-
HEXA	Penta- plus one
HEXA	Quadri- plus bi-
HEXA	Half dodeca-
HEXA	Octa- minus two
HEXA	Two less than octa-
HEXA	Quadri- plus two

HEXA	It may go before -gon
HEXA	Prefix meaning "six"
HEXA	Gram or decimal starter
HEXA	"Six" prefix
HEXA	Word form of "six"
HEXA	Six: Prefix
HEXA	Decimal opening
HEXA	Penta- + 1

HEXA	Tri- doubled
HEXA	Tri- times two
HEXA	Six: Prefix.
HEXA	Six: Comb. form.
HEXA	Six: Comb. form
HEXA	Lead-in for gram
HEXA	One less than septi-
HEXA	Prefix re honeycombs

HEXA	Prefix with -gram
HEXA	Prefix with -gon
HEXA	Dodeca- halved
HEXA	Prefix with syllabic
HEXA	Prefix with -hedron
HEXA	Prefix with meter
HEXA	One more than penta-
HEXA	Prefix with -pod

HEXA	One meter start?
HEXA	Decimal starter
HEXA	Prefix related to benzene's shape
HEXA	Prefix meaning six
HEXA	Six: prefix