ADJ

firm, hard
muddy, soft, wet
dry, dusty
fertile (often figurative)
The fall of the old regime provided fertile ground for opportunism

VERB + GROUND

fall to, hit
The helicopter burst into flames when it hit the ground
reach
She's so short, her feet don't reach the ground when she sits down
get off, leave
The plane was so overloaded it couldn't leave the ground. (figurative) His plan is too costly to ever get off the ground

GROUND + NOUN

level
A waterproof membrane is built into the wall just above ground level

PREP

above/below ~
The roots may spread as far below ground as does the foliage above ground
in the ~
a hole in the ground
on the ~
He sat down on the ground
under the ~
The tunnel goes deep under the ground

ADJ

high, low
The village stands on high ground and is not prone to flooding
open
difficult, rocky, rough, stony, uneven
marshy

QUANT

patch, piece
We found a patch of open ground in the middle of the woods

ADJ

burial
dumping
cricket, football, practice, rugby, sports, training
parade
breeding, feeding, hunting

PREP

at a/the ~
I'll meet you at the football ground
in a/the ~
all the graves in the burial ground

ADJ

extensive
castle, hospital, palace, school, etc.

VERB + GROUND

be set in, have
The palace is set in extensive grounds

PREP

in the ~ (of)
Many estate workers lived in cottages in the grounds of the castle

ADJ

familiar, firm, home
I was on more familiar ground now that we were talking about our own system
dangerous, shaky
Legally, we're on very shaky ground (= our actions may not be legal)
safe
common
Both parties in the debate shared some common ground

VERB + GROUND

cover, go over
Several researchers have published articles covering this ground. We just seem to be going over the same ground that we covered last year

PREP

on … ~
He knew he was on dangerous ground talking about money

PHRASES

break new ground
Her architectural designs have broken new ground

ADJ

good, reasonable, sufficient, valid

VERB + GROUND

have
The constable had reasonable grounds for arresting her
give (sb)
His evasiveness gave grounds for the suspicion that he knew more than he was saying

PREP

on … ~s
Permission to open a mine was denied on environmental grounds
on the ~s of
He resigned from his post on the grounds of ill-health
~ for
Drunkenness at work was sufficient grounds for instant dismissal