A dictionary of Confusable Phrases: More Than 10,000 Idioms and Collocations

grease the wheels • squeaky wheel gets the grease,
the
grease the wheels —make progress easier: Those you interact
with will know how to grease the wheels of commerce and get
things done.
squeaky wheel gets the grease, the—(saying ) the person who
complains loudest and longest gets service or attention: It
seems that the “squeaky wheel gets the grease”— the students
who complain loudest get the rules bent for them.
great at something • great in something • great
with something
great at something —highly proficient in an activity: She is
great at making up dishes and experiments all the time.
great in something —excelling in a subject: She is great in
math. She has a wonderful teacher that truly cares…
great with something —very skilful in the use of tools, etc.:
John is great with a bit of crayon.
Great Britain • Greater Britain
Great Britain —
1
. the island comprising England, Wales,
and Scotland: Great Britain is separated from the mainland
by the English Channel and from Ireland by the Irish Sea. 2.
(also: United Kingdom of Great Britain and Northern Ireland,
the) the British state as a whole comprising Great Britain and
Northern Ireland: She has lived in Great Britain for so long
now that English has become her second language.
Note: 
The name British Isles, the is a geographical term (not
a political one) for the islands comprising Great Britain and Ire-
land with all their offshore islands: The British Isles has a rich
diversity of folklore, stemming in part from the mix of cultural
identity from region to region.
Greater Britain—(hist.) Great Britain and the colonies; the
British Empire: But was there not an entente which must be
the great ideal of every Briton — the entente cordiale between
Great and Greater Britain?