phlebogram vs venogram

phlebogram and venogram both are nouns.

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

As nouns, phlebogram and venogram are synonyms defined as:

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

phlebogram (noun)	venogram (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