Ig vs immune gamma globulin

Ig and immune gamma globulin both are nouns.

Word	Noun	Adjective	Verb	Adverb
Ig	Yes	No	No	No
immune gamma globulin	Yes	No	No	No

As nouns, Ig and immune gamma globulin are synonyms defined as:

Ig and immune gamma globulin: a class of proteins produced in lymph tissue in vertebrates and that function as antibodies in the immune response

Other synonyms of Ig include immune globulin, immune serum globulin, immunoglobulin.

Ig (noun)	immune gamma globulin (noun)
a class of proteins produced in lymph tissue in vertebrates and that function as antibodies in the immune response	a class of proteins produced in lymph tissue in vertebrates and that function as antibodies in the immune response