echogram vs sonogram

echogram and sonogram both are nouns.

Word	Noun	Adjective	Verb	Adverb
echogram	Yes	No	No	No
sonogram	Yes	No	No	No

As nouns, echogram and sonogram are synonyms defined as:

echogram and sonogram: an image of a structure that is produced by ultrasonography (reflections of high-frequency sound waves); used to observe fetal growth or to study bodily organs

echogram (noun)	sonogram (noun)
an image of a structure that is produced by ultrasonography (reflections of high-frequency sound waves); used to observe fetal growth or to study bodily organs	an image of a structure that is produced by ultrasonography (reflections of high-frequency sound waves); used to observe fetal growth or to study bodily organs