Were East Indiamen's timbers as thick as a warship's?

Were East Indiamen as heavily armoured as military ships?

Their timbers could be about as thick, but that thickness primarily supported heavy cargo and protected the hull against the sea.

The timber thickness of an East Indiaman could be much like that of a warship. Much of that strength was needed to support the cargo and withstand the sea. Describing it simply as armour confuses load-bearing structure with deliberate protection against weapons. A strong merchant hull could resemble naval construction while serving a commercial purpose.