cementite vs iron carbide

cementite and iron carbide both are nouns.

Word	Noun	Adjective	Verb	Adverb
cementite	Yes	No	No	No
iron carbide	Yes	No	No	No

As nouns, cementite and iron carbide are synonyms defined as:

cementite and iron carbide: a chemical compound that is a constituent of steel and cast iron; very hard and brittle

cementite (noun)	iron carbide (noun)
a chemical compound that is a constituent of steel and cast iron; very hard and brittle	a chemical compound that is a constituent of steel and cast iron; very hard and brittle