The tag alias #77076 head_lights_head_light_headlights -> headlight has been rejected.
Reason: Plural to singular. The word without the space is the proper version.
Not meant to be confused with headlamp according to the wiki page: A head-mounted personal equipment.
EDIT: The tag alias head_lights_head_light_headlights -> headlight (forum #454081) has been rejected by @cabo27judy.
Updated