1. Extremely alarming
   - bloodcurdling, hair-raising

See also: alarming

Encyclopedia: Nightmarish

• lingulate
• Lingvo Kosmopolita
• liniment
• linin
• lining
• link
• Link trainer
• link-attached station
• link-attached terminal
• linkage
• linkage editor
• linkage group
• linkboy
• linked
• linked genes
• linker
• linking verb
• linkman
• links
• links course
• linksman
• linkup
• Linnaea
• Linnaea borealis
• Linnaea borealis americana