IT vs engineering science

IT and engineering science both are nouns.

Word	Noun	Adjective	Verb	Adverb
IT	Yes	No	No	No
engineering science	Yes	No	No	No

As nouns, engineering science is a hypernym of IT; that is, engineering science is a word with a broader meaning than IT:

IT: the branch of engineering that deals with the use of computers and telecommunications to retrieve and store and transmit information
engineering science: the discipline dealing with the art or science of applying scientific knowledge to practical problems

Other hypernyms of IT include applied science, engineering, technology.

IT (noun)	engineering science (noun)
the branch of engineering that deals with the use of computers and telecommunications to retrieve and store and transmit information	the discipline dealing with the art or science of applying scientific knowledge to practical problems