- J
- Jabber
- Jabberer
- Jack and jill
- Jackdaw
- Jackknife
- Jackpot
- Jactation
- Jaded
- Jager
- Jaggery
- Jaguar
- Jailed
- Jam
- Jam into
- Jam tomorrow
- Jamadagni
- Jamun
- Janitor
- January-february
- Janus-like
- Jape
- Jargon
- Jarring
- Jas
- Jasper
- Java island
- Java plum
- Javelin
- Jay walker
- Jaywalk
- Jazz up
- Jealously
- Jeans
- Jeer at
- Jehovah's witnesses
- Jejune
- Jell
- Jellify
- Jeremiad
- Jerk off
- Jest
- Jesting
- Jet-setter
- Jetlag
- Jetty
- Jewess
- Jhum cultivation
- Jolly
- Jim crow
- Jingle
- Jinn
- Jittery
- Jl
- Jobs comforter
- Jockey
- Jocularly
- Jocund
- Jogger
- Join forces
- Join hands
- Joint family
- Joint stock
- Joint stock company
- Jollify
- Jolly boat
- Jolt
- Jotter
- Journalist
- Jove
- Joviality
- Joyful
- Joystick
- Jubilation
- Judas
- Judas iscariot
- Judged
- Judgement
- Jug
- Jugged hare
- Jugular
- Jujitsu
- Jujuba tree
- Jump at
- Jump on
- Jump-lead
- Jumped-up
- Jumping
- Jumping locust
- Jumping-off point
- Juncture
- June
- Junk bond
- Junk food
- Jurassic
- Just about
- Just as the doctor ordered
- Justifiable homicide
- Justly
- Justness