- keep a straight face
- keep a weather eye out
- keep abreast of
- keep after
- keep an eye on
- keep an eye out for
- keep at
- keep at arm's length
- keep away
- keep back
- keep body and soul together
- keep company
- keep cool
- keep down
- keep fit
- keep from
- keep house
- keep in
- keep in mind
- keep in the dark
- keep in touch
- keep in with
- keep it up
- keep late hours
- keep off
- keep on
- keep one's chin up
- keep one's cool
- keep one's distance
- keep one's end up
- keep one's eye on the ball
- keep one's eyes open
- keep one's fingers crossed
- keep one's hand in
- keep one's hands off
- keep one's head
- keep one's mouth shut
- keep one's nose clean
- keep one's nose to the grindstone
- keep one's own counsel
- keep one's powder dry
- keep one's shirt on
- keep one's temper
- keep one's wits about one
- keep one's word
- keep oneself to oneself
- keep out
- keep pace
- keep posted
- keep quiet
- keep tabs on
- keep the ball rolling
- keep the lid on
- keep the peace
- keep the wolf from one's door
- keep the wolf from the door
- keep time
- keep to
- keep to oneself
- keep track
- keep under
- keep under one's hat
- keep under wraps
- keep up
- keep watch
- keep your . . .
- keeper
- keeper hook
- keeper ring
- keeping
- keeping room
- keeping up with the Joneses
- keepnet
- keepsake
- keepy-uppy
- keeshond
- keet
- kef
- keffiyeh
- kefir
- keftedes
- keg
- keg party
- kegler
- kegling
- kehillah
- kehua
- kei-apple
- keiretsu
- keirin
- keister
- keitloa
- kekeno
- kekerengu
- keks
- kelebe
- kelek
- kelep
- kellion
- kelly
- kelly green
- keloid
- kelp
- kelp bass
- kelp crab
- kelp greenling
- kelper
- kelpfish
- kelpie
- kelpy
- kelson
- kelt
- kelter
- kelvin
- kelyphitic rim
- kembla
- kemp
- kempt
- ken
- kenaf
- kenbei
- kench
- kendo
- kennel
- kennel club
- kennel cough
- kennett
- kenning
- keno
- kenogenesis
- kenosis
- kenspeckle
- kent
- kente
- kentia
- kentia palm
- kentledge
- kep
- kepi
- kept
- ker-
- keramic
- keramics
- keratalgia
- keratectomy
- keratin
- keratinize
- keratinous
- keratitis
- kerato-
- keratoconjunctivitis
- keratoconus
- keratode
- keratoderma
- keratogenous
- keratoid
- keratolysis
- keratoma
- keratometer
- keratomileusis
- keratoplasty
- keratoscope
- keratose
- keratosis
- keratotomy
- kerb
- kerb appeal
- kerb crawling
- kerb drill
- kerb market
- kerb weight
- kerbaya
- kerbing
- kerbside
- kerbstone
- kerchief
- kerchoo
- kerel
- kereru
- kerf
- kerflooey
- kerflop
- kerfuffle
- kerky
- kerma
- kermes
- kermesite
- kermis
- kern
- kernel
- kernel sentence
- kernel smut
- kerning
- kernite
- kernmantel rope
- kernos
- kero
- kerogen
- kerosene
- kerplunk
- kerria
- kerry
- kersey
- kerseymere
- kerygma
- kestrel
- ket-
- keta
- ketamine
- ketch
- ketch-rigged
- ketchup
- kete
- ketene
- keto
- keto flu
- keto form
- keto-
- keto-enol tautomerism
- ketoacidosis
- ketoconazole
- ketogenesis
- ketogenic
- ketogenic diet
- ketohexose
- ketolysis
- ketonaemia
- ketone
- ketone body
- ketone group
- ketonemia
- ketonuria
- ketose
- ketosis
- ketosteroid
- ketoxime
- kettle
- kettle base
- kettle corn
- kettle hat
- kettle hole
- kettle of fish
- kettle stitch
- kettle-bottom
- kettlebell
- kettledrum
- kettling
- ketubah
- kevalin
- kevel
- kewl
- kex
- key
- key card
- key case
- key club
- key drive
- key fob
- key fruit
- key grip
- key in
- key light
- key money
- key plate
- key punch
- key ring
- key scarf
- key signature
- key stage
- key station
- key up
- key worker
- key-man assurance
- keyboard
- keyboard warrior
- keyboardist
- keycap
- keychain
- keyed
- keyhole
- keyhole saw
- keyhole surgery
- keying sequence
- keyless
- keylock
- keylogger
- keylogging
- keyman
- keyman insurance
- keynote
- keynote address
- keynoter
- keypad
- keypal
- keypunch
- keyring drive
- keys
- keyslot
- keysmash
- keystone