Ruff is an extension of a starched frill, worn round the neck. It could also mean the colored rings of hairs or feathers round the neck of a mammal or bird.
A. "I eventually bought the Jacobean ruff."
B. "A ruff of long sharp tipped pointed feathers."
Rough means when something or a surface isn't smooth, unrefined, coarse and unsophisticated.
"Your shirt looks rough, have it pressed."
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