Merriam-Webster's Collegiate Dictionary:
chloral
chloral hydrate
chloralose
chloramine
chloramphenicol
chlorate
chlordane
chlordiazepoxide
chlorella
chlorenchyma
chlorhexidine
chloride
chloride of lime
chlorinate
chlorinated lime
chlorination
chlorinator
chlorine
chlorine dioxide
chlorine monoxide
chlorinity
chlorite
chloritic
chloro-
chlorobenzene
chlorofluorocarbon
chlorofluoromethane
chloroform
chlorogenic acid
chlorohydrin
chlorophyll
chlorophyllous
chloropicrin
chloroplast
chloroplastic
chloroprene
chloroquine
chlorosis
chlorothiazide
chlorotic
chlorpheniramine
chlorpromazine
chlorpropamide
chlorpyrifos
chlortetracycline
chm
chmn
cho oyu
choanocyte
choaspes
choate
chocaholic
chock
chock-full
chockablock
chockful
chocoholic
chocolate
chocolate-box
chocolatey
chocolatier
chocolaty
choctaw
choice
choicely
choiceness
choir
choir loft
choirboy
choirmaster
choiseul
choisy
choisy-le-roi
choke
choke chain
choke coil
choke collar
choke hold
choke off
choke point
chokeberry
chokecherry
choker
choking
chokingly
choky
chol-
cholangiogram
cholangiographic
cholangiography
cholate
chole-
cholecalciferol
cholecystectomized
cholecystectomy
cholecystitis
cholecystokinin
