USED TO VS. AM/ IS/ ARE USED TO
Used to do - used to do something, but now I don't do it.
When Alice was sixteen she used to like karaoke.
Am/ is/ are used to something/ doing - accustomed to something
He is used to the climate of England.
He is used to living in the climate of England.
* Note that these two expressions differ not only in meaning, but also in control. After used to, only the infinitive should go, and after am/ is/ are used to, only the gerund or noun.
FARTHER-THE FARTHEST VS. FURTHER-THE FURTHEST
Both groups of these degrees of comparison were formed from the adjective far - "distant, distant". Both of these groups denote "more distant" - farther and further; "the farthest" - the farthest and the furthest.
Her new apartment is much farther/ further than she told me.
Moscow is the farthest / furthest city I have ever travelled to.
However, further-the furthest also has another, more common meaning, which farther-the farthest does not have. This meaning is “following, further (about information, information)”. Moreover, in this sense, further and the furthest are interchangeable.
We will send you further/ the furthest information by e-mail.
ARRIVE IN VS. ARRIVE AT
The expressions arrive in and arrive at are translated in the same way - “arrive, arrive somewhere”.
Arrive in - to come to "large" settlements - cities, countries, continents.
Call me when you arrive in Berlin.
Arrive at - come to "small" places: hotels, airports, train stations, houses, etc.
After arriving at a hotel a visitor should check in.
ELDER-THE ELDEST VS. OLDER-THE OLDEST
The comparative and superlative from the adjective old can be formed in two ways - Elder-the eldest and older-the oldest. Both of these forms mean "older" and "oldest" respectively. However, in addition to this meaning, elder-the eldest is most often used in the meaning of "senior in the family." For example,elder brother,the eldest brother. At the same time, when talking about seniority in the family, it is not recommended to use the older-the oldest form.
GOLD VS. GOLDEN
Gold - made of gold: gold ring (golden ring), gold crown (golden crown).
Golden - similar to gold, "golden": golden autumn (golden autumn), golden color (golden hue).
SILK VS. SILKY
Silk - made of silk, "silk": silk dress (silk dress), silk needle (silk thread).
Silky - feels like silk, "silky": silky hair (silky hair), silky skin (silky skin).
STONE VS. STONY
Stone - made of stone: stonec wall (stone wall), stone age (stone age).
Stony - cold, indifferent as a stone: stony look (stone look), stony behavior (indifferent behavior).
FEATHER VS. FEATHERY
Feather - made of feathers: feather blanket (feather blanket), feather scarf (feather scarf).
Feathery - similar in appearance or feel to a feather, "feathery": feathery clouds (feathery clouds), feathery touch (gentle touch).