seminoma vs testicular cancer

seminoma and testicular cancer both are nouns.

Word	Noun	Adjective	Verb	Adverb
seminoma	Yes	No	No	No
testicular cancer	Yes	No	No	No

As nouns, seminoma and testicular cancer are synonyms defined as:

seminoma and testicular cancer: malignant tumor of the testis; usually occurring in older men

seminoma (noun)	testicular cancer (noun)
malignant tumor of the testis; usually occurring in older men	malignant tumor of the testis; usually occurring in older men