Formal & informal words

Formality is all about your relationship with the person you're speaking or writing to. If you uses formal language, it may be because you wish to show respect, politeness, or to put yourself at a distance (official language). Informal language can show friendliness, equality or a feeling of closeness and solidarity with someone. You should never use informal language just to sound fluent or clever. 


some groups of words can be put on a scale from (very) formal to (very) informal.
ex: offspring --- children --- kids
     abode/residence --- house/flat --- place
     alcoholic beverages --- drink --- booze
     reimbursed --- expense --- money back
There are some slang words

1. quid (pounds)
2. spuds (potatoes)
3. bike (bicycle)
4. bye (goodbye)
5. fridge (refrigerator)

and some clipping words

lab(oratory), telly (television), ad(vertisement), advert(isement), (news)paper, (tele)phone, vet(erinary)