1. That can be given a date
   "a concrete and datable happening"
   - dateable

Antonym: undatable

• hairline
• hairline fracture
• hairnet
• hairpiece
• hairpin
• hairpin bend
• hairsbreadth
• hairsplitter
• hairsplitting
• hairspring
• hairstreak
• hairstreak butterfly
• hairstyle
• hairstylist
• hairtail
• hairweaving
• hairy
• hairy darling pea
• hairy finger grass
• hairy golden aster
• hairy honeysuckle
• hairy lip fern
• hairy root
• hairy spurge
• hairy tare