counterperson vs. counterwoman
counterman vs. counterperson
contributor vs. subscriber
conversationalist vs. conversationist
conversationalist vs. schmoozer
cryptanalyst vs. cryptographer
cryptanalyst vs. cryptologist
counterspy vs. mole
convert vs. exchange
convert vs. convince
countryman vs. ruralist
curate vs. minister
cook vs. fix
cook vs. fake
couturier vs. designer
custodian vs. keeper
custodian vs. steward
cowboy vs. puncher
cowpuncher vs. puncher
cowman vs. puncher
conscript vs. draftee
conservationist vs. environmentalist
conjurer vs. conjuror
conjurer vs. magician
conjurer vs. prestidigitator
conjurer vs. illusionist
castrate vs. eunuch
castrate vs. neuter
castrate vs. emasculate
castrate vs. expurgate
castrate vs. shorten
chief vs. main
chief vs. head
counterfeiter vs. forger
crasher vs. gatecrasher
churl vs. niggard
churl vs. skinflint
churl vs. scrooge
crone vs. hag
cretin vs. imbecile
caffer vs. kaffir
caffre vs. kaffir
clansman vs. clanswoman
courier vs. messenger
cadger vs. moocher
chiliast vs. millenarian
charlatan vs. mountebank
chiromancer vs. palmist
coddler vs. spoiler
conceiver vs. mastermind
chooser vs. selector
cutpurse vs. dip
culprit vs. perpetrator
complainant vs. plaintiff
contriver vs. planner
craniologist vs. phrenologist
cunctator vs. procrastinator
coder vs. programmer
ceramicist vs. potter
ceramist vs. potter
carrottop vs. redhead
crusader vs. reformist
chased vs. pursued
cenobite vs. coenobite
confuter vs. rebutter
caviller vs. quibbler
caviler vs. quibbler
classmate vs. schoolmate
cracksman vs. safebreaker
colonist vs. settler
cropper vs. sharecropper
contrabandist vs. runner
cabdriver vs. taximan
cabman vs. taximan
cabby vs. taximan
coaxer vs. wheedler
cornetist vs. trumpeter
carouser vs. wassailer
chawbacon vs. hick
complainer vs. squawker
crybaby vs. squawker
counterglow vs. gegenschein
cyclosis vs. streaming
cloudburst vs. waterspout
cleistocarp vs. cleistothecium
conduction vs. conductivity
conditions vs. weather
conidiospore vs. conidium
cedar vs. cedarwood
citronwood vs. sandarac
cowslip vs. kingcup
cowslip vs. paigle
cocoswood vs. cocuswood
cassie vs. huisache
clover vs. trefoil
campion vs. silene
catchfly vs. lychnis
catchfly vs. silene
cocksfoot vs. cockspur
colza vs. rape
crinkleroot vs. toothwort
cleome vs. spiderflower
celandine vs. swallowwort
cocklebur vs. cockleburr
camomile vs. chamomile
cornflower vs. strawflower
coreopsis vs. tickseed
coreopsis vs. tickweed
coltsfoot vs. galaxy
cymbid vs. cymbidium
coralberry vs. spiceberry
caryopsis vs. grain
currajong vs. kurrajong
clearweed vs. richweed
chaulmoogra vs. chaulmugra
camas vs. camass
camas vs. camosh
camas vs. camash
cantala vs. maguey
crotalaria vs. rattlebox
campeachy vs. logwood
chanal vs. chanar
crazyweed vs. locoweed
caranda vs. caranday
chinchona vs. cinchona
cloudberry vs. salmonberry
chinaberry vs. jaboncillo
clocks vs. filaria
cumquat vs. kumquat
cyrilla vs. leatherwood
chittamwood vs. shittimwood
chittimwood vs. shittimwood
coolwart vs. foamflower
cypre vs. salmwood
catmint vs. catnip
calceolaria vs. slipperwort
capsicum vs. pepper
cupflower vs. nierembergia
casava vs. cassava
cassava vs. manioc
cassava vs. manioca
camelia vs. camellia
cornel vs. dogwood
crottal vs. crottle
crotal vs. crottle
chantarelle vs. chanterelle
capitulum vs. spike
capitulum vs. head
caudex vs. stock
cladode vs. cladophyll
cladode vs. phylloclad
cladode vs. phylloclade
chattel vs. movable
clobber vs. stuff
clobber vs. lick
circumstances vs. fate
comforts vs. conveniences
cent vs. penny
centime vs. penny
coin vs. strike
coin vs. vamp
checkbook vs. chequebook
carbonisation vs. carbonization
catabolism vs. katabolism
catabolism vs. dissimilation
chemisorption vs. chemosorption
congealment vs. congelation
convalescence vs. recovery
corroding vs. corrosion
corrosion vs. erosion
clotting vs. curdling
coagulation vs. curdling
cytogenesis vs. cytogeny
cataphoresis vs. electrophoresis
curing vs. hardening
catamenia vs. menstruation
congius vs. gallon
centimeter vs. centimetre
centimeter vs. cm
coss vs. kos
cwt vs. hundredweight
centner vs. hundredweight
cental vs. hundredweight
century vs. hundred
chiliad vs. grand
cinque vs. five
cotan vs. cotangent
cosec vs. cosecant
cognation vs. consanguinity
cognation vs. enation
crenation vs. scallop
crenature vs. scallop
crescent vs. semilunar
crescent vs. lunate
crinkle vs. line
cuneus vs. wedge
companionship vs. society
captivity vs. enslavement