To corroborate something that has been said or reported means to give information or evidence that further supports it.
Someone who is incorrigible has bad habits or does bad things and is unlikely to ever change; this word is often used in a humorous way.
Something that is corrugated has parallel ridges, troughs, or grooves in it.
Corrosion refers to the gradual rusting or decay of metal.
Differentiated vocabulary for your students is just a click away.