tinplate vs tin plate

tinplate and tin plate both are nouns.

Word	Noun	Adjective	Verb	Adverb
tinplate	Yes	No	No	No
tin plate	Yes	No	No	No

As nouns, tinplate and tin plate are synonyms defined as:

tinplate and tin plate: a thin sheet of metal (iron or steel) coated with tin to prevent rusting; used especially for cans, pots, and tins

tinplate (noun)	tin plate (noun)
a thin sheet of metal (iron or steel) coated with tin to prevent rusting; used especially for cans, pots, and tins	a thin sheet of metal (iron or steel) coated with tin to prevent rusting; used especially for cans, pots, and tins