decal vs decalcomania

decal and decalcomania both are nouns.

Word	Noun	Adjective	Verb	Adverb
decal	Yes	No	No	No
decalcomania	Yes	No	No	No

As nouns, decal and decalcomania are synonyms defined as:

decal and decalcomania: either a design that is fixed to some surface or a paper bearing the design which is to be transferred to the surface

decal (noun)	decalcomania (noun)
either a design that is fixed to some surface or a paper bearing the design which is to be transferred to the surface	the art of transferring designs from specially prepared paper to a wood or glass or metal surface
	either a design that is fixed to some surface or a paper bearing the design which is to be transferred to the surface