gentle, slight, wide
hairpin (BrE), sharp, tight
Some of the hairpin bends had Ruth clinging to her seat.

dangerous
blind (BrE)
mountain roads with steep gradients and blind bends

left-hand, right-hand
final, last, opening (= in a race)
He had a winning lead off the final bend.

series
a series of dangerous bends

come around, come round (esp. BrE), negotiate, round, take, turn
He slowed down to negotiate the bend.

around a/the bend, round a/the bend (esp. BrE)
The car vanished around a bend.

into a/the bend
I inched the car into the bend.

off a/the bend
He came off the bend in the lead.

on a/the bend
Slow down on the tight bends.

bend in
a wide bend in the river

slightly
quickly, swiftly
slowly
back, backwards/backward, forward
down, over
I bent down and tied my shoelace.

close, nearer
Sarah bent close to him.

double
I had to bend double to get under the table.

at
Avoid bending at the waist when lifting heavy objects.

towards/toward
He came closer and bent towards/toward her.

Bend is used with these nouns as the subject:
arm, gravity, leg, road, street

Bend is used with these nouns as the object:
arm, back, elbow, head, knee, leg, ray, rule, spine, truth, wire, wrist