deep, long, nasty
light, little, minor, slight, small
His only injuries were some minor scratches above his eye.

a few, numerous
cat

have
get
leave, make
Powdered cleansers will leave scratches on the glass.

mark

without a scratch
She emerged from the wrecked vehicle without a scratch.

badly
The table had been badly scratched.

absently (esp. AmE)
He absently scratched his head.

lightly

at
He scratched at his beard for a few seconds.
I could hear the dog scratching at the door.

on
I scratched my arm on a rose bush.

with
She scratched his face with her nails.

Scratch is used with these nouns as the subject:
cat, chicken, dog, hen, nail

Scratch is used with these nouns as the object:
back, beard, belly, chin, head, itch, living, nose, scalp, spot, surface

Scratch is used with these nouns:
mark, pad, paper, player