Collocations for razor - noun

blunt
cut-throat (esp. BrE), disposable, electric, safety, straight-edge (AmE)
a mugger who slashed a man with a cut-throat razor

open
He appeared with an open razor in his hand.

cut sb/sth with, shave with, slash sb/sth with, use
We used a razor to cut the string.

blade
wire

with a/the razor
He slashed his wrists with a razor.