venogram vs phlebogram

venogram and phlebogram both are nouns.

Word	Noun	Adjective	Verb	Adverb
venogram	Yes	No	No	No
phlebogram	Yes	No	No	No

As nouns, venogram and phlebogram are synonyms defined as:

venogram and phlebogram: an X ray of a vein injected with a radiopaque contrast medium

venogram (noun)	phlebogram (noun)
an X ray of a vein injected with a radiopaque contrast medium	an X ray of a vein injected with a radiopaque contrast medium