- calcium channel blocker
- calcium chloride
- calcium cyanamide
- calcium cyanide
- calcium fluoride
- calcium gluconate
- calcium hydroxide
- calcium hypochlorite
- calcium light
- calcium metasilicate
- calcium nitrate
- calcium oxalate
- calcium oxide
- calcium permanganate
- calcium phosphate
- calcium propionate
- calcium silicate
- calcium sulfide
- calcrete
- calcsinter
- calc-sinter
- calcspar
- calc-spar
- calc-tufa
- calculable
- calculate
- calculated
- calculated risk
- calculating
- calculating machine
- calculation
- calculator
- calculous
- calculus
- calculus of finite differences
- calculus of variations
- Calcutta
- Calcutta Cup
- caldarium
- Caldecott award
- Calder
- Calder, Alexander
- caldera
- Calderdale
- Calderón de la Barca
- caldron
- Caldwell
- Caleb
- Calebite
- calèche
- Caledon
- Caledonia
- Caledonian
- Caledonian Canal
- calef.
- calefacient
- calefaction
- calefactory
- calendar
- calendar art
- calendar clock
- calendar day
- calendarize
- calendar month
- calendar watch
- calendar year
- calender
- calends
- calendula
- calenture
- calesa
- calescent
- Calexico
- calf
- calf's-foot jelly
- calf 's-foot jelly
- calf 's tongue
- calf diphtheria
- calf love
- calf roping
- calfskin
- Calgary
- Calgary redeye
- Calgon
- Calhoun
- Calhoun, John C.
- Cali
- Caliban
- caliber
- calibrate
- calibration
- calibre
- calices
- caliche
- calicle
- calico
- calicoback
- calico bass
- calico bug
- calico bush
- calico cat
- calico clam
- calicoed
- calico flower
- caliculus
- Calicut
- caliduct
- calif
- Calif.
- califate
- califont
- California
- California bluebell
- California Current
- California fan palm
- California gold fern
- California gull
- California job case
- California laurel
- California live oak
- California mink
- Californian
- Californian spangled cat
- California nutmeg
- California poppy
- California privet
- California quail
- California roll
- California rose
- California rosebay
- californite
- californium
- caliginous
- Caligula
- calimanco
- Calimere
- calimocho
- calipash
- calipee
- caliper
- caliper rule
- caliph
- caliphate
- calisaya
- calisthenics
- calix
- Calixtine
- Calixtus I
- Calixtus II
- Calixtus III
- calk
- calker
- calkin
- call
- calla
- callable
- Callaghan
- call a halt
- callais
- call alarm
- callaloo
- call-and-response
- Callanetics
- callant
- Callao
- Callas
- call a spade a spade
- callathump
- callback
- call back
- call-board
- call box
- callboy
- call center
- call centre
- call down
- called strike
- caller
- caller ID
- Calles
- call for
- call forth
- call forwarding
- call girl
- call house
- calli-
- Callicrates
- calligraph
- calligraphy
- Callimachus
- call in
- calling
- calling card
- call-in pay
- call in question
- call in sick
- calliope
- Calliope
- calliopean
- calliopsis
- callipash
- calliper
- calliper rule
- Callippic cycle
- Callippus
- callipygian
- callistemon
- Callisthenes
- callisthenics
- Callisto
- Callistus I
- call it a day
- callithump
- call it quits
- call letters
- call loan
- call market
- call money
- call names
- call number
- call of duty
- call off
- call of nature
- Call of the Wild, The
- call on
- call one's own
- call on the carpet
- callop
- callosal
- callose
- callosity
- Callot
- callous
- callousness
- callout
- call out
- callow
- Callow
- Calloway
- call rate
- call sign
- call slip
- call someone's bluff
- call the shots
- call the tune
- call to account
- call to arms
- call to mind
- call to order
- call to quarters
- call up
- call-up
- call upon
- callus
- call waiting
- calm
- calmative
- calm before the storm
- calmly
- calmodulin
- calmy
- Caló
- calochortus
- calomel
- calomel electrode
- Caloocan
- Caloosahatchee
- caloreceptor
- calorescence
- Calor Gas
- calori-
- caloric
- calorie
- Calorie
- calories
- calorifacient
- calorific
- calorific value
- calorimeter
- calorimetry
- calorize
- calotte
- calotype
- caloyer
- calpac
- calpain
- Calpe
- calPERS
- Calpurnia
- calque
- Caltanissetta
- Caltech
- caltrop
- caltrop family
- calumet
- Calumet City
- calumniate
- calumnious
- calumny
- calutron
