I.Q. vs IQ

I.Q. and IQ both are nouns.

Word	Noun	Adjective	Verb	Adverb
I.Q.	Yes	No	No	No
IQ	Yes	No	No	No

As nouns, I.Q. and IQ are synonyms defined as:

I.Q. and IQ: a measure of a person's intelligence as indicated by an intelligence test; the ratio of a person's mental age to their chronological age (multiplied by 100)

Other synonyms of I.Q. include intelligence quotient.

I.Q. (noun)	IQ (noun)
a measure of a person's intelligence as indicated by an intelligence test; the ratio of a person's mental age to their chronological age (multiplied by 100)	a measure of a person's intelligence as indicated by an intelligence test; the ratio of a person's mental age to their chronological age (multiplied by 100)