https://www.ncbi.nlm.nih.gov/books/NBK542588/

Traumatic [[brain injury]] (TBI) is defined as a result of a [[bump]], blow or [[jolt]] to the [[head]] or a [[penetrating head injury]] that disrupts the normal function of the [[brain]]. This [[trauma]] can lead to temporary or permanent [[impairment]]s of cognitive, physical, and psychosocial functions, and an associated diminished or altered state of [[consciousness]]
((Traumatic Brain Injury Center. (n.d.). Centers for Disease Control and Prevention. Retrieved May 1, 2012, from http://www.cdc.gov/traumaticbraininjury/)).

Although there are still contradictions regarding the clinical significance of the term "[[head injury]]", it can not be considered synonymous with [[traumatic brain injury]].