nighthawknight‧hawk /ˈnaɪthɔːk $ -hɒːk/ noun [countable] American English informal 
someone who enjoys staying awake all night SYN night owl
someone who enjoys staying awake all night SYN night owl- blood feud
- blood group
- blood heat
- bloodhound
- bloodless
- bloodlessly
- bloodletting
- bloodline
- blood lust
- blood money
- blood orange
- blood poisoning
- blood pressure
- blood-red
- blood relation
- bloodshed
- bloodshot
- blood sport
- bloodstain
- bloodstained
- bloodstock
- bloodstream
- bloodsucker
- bloodthirsty
- blood transfusion