iron

As nouns the difference between drug and iron

is that drug is (pharmacology) a substance used to treat an illness, relieve a symptom, or modify a chemical process in the body for a specific purpose or drug can be (obsolete) a drudge while iron is pencil.

As a verb drug

is to administer intoxicating drugs to, generally without the recipient's knowledge or consent or drug can be (drag).

Iron is a synonym of durable.

As nouns the difference between iron and durable

is that iron is pencil while durable is (economics) a durable good, one useful over more than one period, especially a year.

As an adjective durable is

able to resist wear, decay; lasting; enduring.