rod

rod /ˈrɑːd/ noun
plural rods
rod
/ˈrɑːd/
noun
plural rods
Britannica Dictionary definition of ROD
[count]
1 
2 
: a pole with a line and usually a reel that is used in fishing
3 
old-fashioned : a stick used to hit or whip someone as a form of punishment

rule with a rod of iron

— see 2rule