encephalogram vs electroencephalogram

encephalogram and electroencephalogram both are nouns.

Word	Noun	Adjective	Verb	Adverb
encephalogram	Yes	No	No	No
electroencephalogram	Yes	No	No	No

As nouns, encephalogram and electroencephalogram are synonyms defined as:

encephalogram and electroencephalogram: a graphical record of electrical activity of the brain; produced by an electroencephalograph

Other synonyms of encephalogram include EEG.

encephalogram (noun)	electroencephalogram (noun)
an X ray of the brain made by replacing spinal fluid with a gas (usually oxygen) to improve contrast	a graphical record of electrical activity of the brain; produced by an electroencephalograph
a graphical record of electrical activity of the brain; produced by an electroencephalograph