armor-plated vs steel-plated

armor-plated and steel-plated both are adjectives.

Word	Noun	Adjective	Verb	Adverb
armor-plated	No	Yes	No	No
steel-plated	No	Yes	No	No

As adjectives, armor-plated and steel-plated are synonyms defined as:

Other synonyms of armor-plated include armor-clad, armour-clad, armour-plated.

armor-plated (adjective)	steel-plated (adjective)
covered with heavy steel	covered with heavy steel