ADJ

big, great, large, mighty, vast
colonial, overseas
the decline of the old colonial empires

VERB + EMPIRE

establish, found
dismantle
The Japanese empire was quickly dismantled
expand
lose
By now Britain had lost its empire

EMPIRE + VERB

grow
collapse, crumble, disintegrate
The mighty empire finally crumbled

PHRASES

the break-up/decline/fall of an empire, part of an empire
a country that is still part of the empire

ADJ

big, huge, large
little (= used to criticize sb's attitude to the things they control)
All the bureaucrats jealously guarded their own little empires
business, commercial, financial, industrial, media

VERB + EMPIRE

build (up), create
He has built a huge business empire from humble beginnings

EMPIRE + VERB

collapse, crumble

PHRASES

the collapse of an empire