As adjectives the difference between unsafe and chancy
is that unsafe is not safe; dangerous while chancy is uncertain, risky, hazardous.
As a proper noun Chancy is
{{surname|A=An|English|from=Old French}.
unsafe
English
Adjective
(-)
not safe; dangerous
Synonyms
* (not held or fixed securely and likely to fall over) precarious, rickety, shaky, tottering, unsteady, unstable, wobbly
chancy
English
Adjective
(er)
uncertain, risky, hazardous
subject to chance; random