laboratory -|- Like a lot of larger words, it helps to break this word down:  labor + a + tory 

language -|- lan + guage 

lasagna -|- Lasagna And Spaghetti Are GoodNourishment Also. 

led -|- lead with an –a is a metal. led is a verb. Example: The map led me to the treasure.  

legible -|- My handwriting is legible.  

lengthwise -|- Although each word can stand alone, when used to describe something it is one word. Lengthwise.  

let's -|- Let's is a contraction for "lets us". Example: Let's go to the store.   

lightening -|- Lightening lightens the sky.  

likable -|- Another –able word. Likable is another word that requires you to drop the –e and add the –eble. 

liquefy -|- It may be tempting to put a second –i in this word, but you must remember to liquefy liquid, you drop the –id and add an -efy 

luxurious -|- To make luxury luxuios, make the –y an –i and add the suffix –ous. 

laugh -|- Laugh And You Get Happy 

liaise -|- You must liaise with colleagues in Italy and Ireland. 

licence -|- 16 year old's with all C's shouldn't get a driver's licence.  

lieutenant -|- Lie U Ten Ants  

loose -|- Loops are Loose. 

lose  -|- Lose lost an O  

leisure -|- This word is so relaxed, it's decided not to follow the –i before –e rule.  

liaison -|- There's no real trick to learning this word, just memorization. Again, it might be helpful to break it up and remember it's parts. li- ais- on  

lightning -|- Lightning lightens the sky.  

loneliness -|- As with most words ending in –y, in order to add the suffix –ness to lonely, you must drop the y and add an –i.