rooster
rooster /ˈruː.stəʳ/ US /-stɚ/
noun [C]
US FOR cock (BIRD)
x
cock
cock (BIRD) /kɒk/ US /kɑːk/
noun [C] (US ALSO rooster)
1 an adult male chicken:
The cock started to crow.
2 used with the name of a bird to refer to the adult male of that type:
a cock robin
a cock pheasant