English Thesaurus
(noun) 
Definition
the back part
He settled back in the rear of the taxi.
Synonyms
back part
,
back
a room at the back of the shop
,
back end
,
back part
,
rear part
,
stern (nautical)
Opposites
, , , , ,
forward end
(noun) 
Definition
the area or position that lies at the back
Musicians played at the front and rear of the procession.
Synonyms
back
She had written a poem on the back of a postcard.
,
end
an ashtray overflowing with cigarette ends
,
tail
We still have the tail of the outbreak to deal with.
,
rearguard
,
tail end
,
back end
(noun) 
Definition
the buttocks
(informal)  He plans to have the five Olympic rings tattooed on his rear.
Synonyms
behind (informal)
jeans that actually flatter your behind
,
backside (informal)
I lost my balance and landed hard on my backside.
,
rump
jeans stretching across her rump
,
rear end
,
seat
a kick in the seat of the pants
,
tail (informal)
He desperately needs a kick in the tail.
,
butt (US, Canadian, informal)
I don't want to sit around on my butt all day.
,
bum (British, slang)
I slipped and fell on my bum.
,
ass (US, Canadian, taboo, slang)
,
buns (US, slang)
,
arse (taboo, slang)
You can't do business sitting on your arse all day.
,
buttocks
Try to relax your whole back, from the buttocks up to the shoulders.
,
posterior
Sit down on your posterior.
,
derrière (euphemistic)
,
tush (US, slang)
,
fundament
,
jacksy (British, slang)
(modifier) 
Definition
of or in the rear
the rear end of a tractor
Synonyms
,
aft
, , ,
after (nautical)
, , ,
trailing
Opposites
(verb) 
Definition
to care for and educate (children) until maturity
I was reared in east Texas.
Synonyms
bring up
,
raise
the house where she was raised
,
educate
She was educated at a local school.
,
care for
,
train
We train them in bricklaying and other building techniques.
,
nurse
She did not have enough milk to nurse the infant.
,
foster
She has fostered more than 100 children.
,
nurture
Parents want to know the best way to nurture and raise their children to adulthood.
(verb) 
Definition
to breed (animals) or grow (plants)
She spends a lot of time rearing animals.
Synonyms
breed
He lived alone, breeding horses and dogs.
,
keep
This eccentric writer kept a lobster as a pet.
,
raise
She raised chickens and pigs.
,
tend
He tended the cat in her illness.
(verb) 
Definition
(of a horse) to lift the front legs in the air and stand nearly upright
The horse reared and threw off its rider.
Synonyms
raise up
,
lift
Curious shoppers lifted their children to take a closer look at the parade.
,
hold up
,
elevate
She elevated her bow and arrow.
,
hoist
He hoisted himself to a sitting position.
,
set upright
(verb) 
The exhibition hall reared above me behind a high fence.
Synonyms
rise
The building rose before him.
,
tower
The coach stood up and towered over them.
,
soar
The steeple soars skyward.
,
loom
He loomed over me.
(verb) 
Definition
to place or lift (something) upright
Synonyms
build
Developers are now proposing to build a hotel on the site.
,
construct
The boxes should be constructed from rough-sawn timber.
,
put up
,
erect
Demonstrators have erected barricades in the roads.
,
fabricate
All the tools are fabricated from high-quality steel.

Additional synonyms

in the sense of arse
Definition
the buttocks or anus
You can't do business sitting on your arse all day.
Synonyms
bottom (informal),
bum (British, slang),
behind (informal),
rear (informal),
tail (informal),
butt (US, Canadian, informal),
ass (US, Canadian, taboo, slang),
buns (US, slang),
backside (informal),
rear end,
derrière (euphemistic),
tush (US, slang),
fundament,
jacksy (British, slang)
in the sense of backside
Definition
the buttocks
I lost my balance and landed hard on my backside.
Synonyms
behind (informal),
bottom (informal),
rear (informal),
tail (informal),
cheeks (informal),
butt (informal),
bum (British, slang),
ass (taboo, slang),
buns (slang),
arse (taboo, slang),
fanny (slang, US, Canadian),
rear end,
haunches,
hindquarters,
derrière (euphemistic),
tush,
fundament,
gluteus maximus,
coit (Australian, slang),
nates,
jacksy (British, slang),
keister or keester (slang, US)
in the sense of bum
Definition
the buttocks or anus
I slipped and fell on my bum.
Synonyms
bottom (informal),
backside (informal),
behind (informal),
arse (taboo, slang),
ass (US, Canadian, taboo, slang),
tail (informal),
butt (US, Canadian, informal),
buns (US, slang),
rear end,
derrière (euphemistic),
tush (US, slang),
fundament,
jacksy (British, slang)

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Video: pronunciation of 'rear'

Source

Thesaurus for rear from the Collins English Thesaurus
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