- laugh softly
- leander
- laugh up sleeve
- laugh track
- ludian
- laugh away
- lingering ache
- lanthanide series
- law and order
- legal proceedings
- legal provision
- lucky
- leavened and preserved fruit_juice (used as a tonic)
- loss of greediness
- loss making
- loss and gain
- loose leaf
- large_minded
- long_sufferance
- lingua
- language area
- langtry
- language current in a country
- language laboratory
- linguistic context
- linguistic geography
- longanimity
- life to hang heavy
- lone wolf
- lone hand
- land grant
- like a bat out of hell
- loving_kindness
- last laugh
- lensman
- libelous
- Listeria monocytogenes
- listeria meningitis
- leprosy bacillus
- L. monocytogenes
- lactobacillus delbruckii
- linear measure
- laws
- land of opportunity
- lanthanide
- lanthanoid
- lanthanon
- landside
- light bulb
- lightbulb