hepatocellular carcinoma vs malignant hepatoma

hepatocellular carcinoma and malignant hepatoma both are nouns.

Word	Noun	Adjective	Verb	Adverb
hepatocellular carcinoma	Yes	No	No	No
malignant hepatoma	Yes	No	No	No

As nouns, hepatocellular carcinoma and malignant hepatoma are synonyms defined as:

Other synonyms of hepatocellular carcinoma include hepatocarcinoma, hepatoma.

hepatocellular carcinoma (noun)	malignant hepatoma (noun)
carcinoma of the liver	carcinoma of the liver