13-letter words containing f, u, m, l, s
- sulfanilamide — a white, crystalline amide of sulfanilic acid, C 6 H 8 N 2 O 2 S, formerly used in the treatment of bacterial infections: replaced by its derivatives and by antibiotics.
- sulfonmethane — a colorless, crystalline compound, C7H16O4S2, used in medicine as a soporific and hypnotic
- sulfur-bottom — blue whale.
- ultra-leftism — the beliefs of extremely left-wing political parties or groups
- umbelliferous — bearing an umbel or umbels.
- unmistrustful — not mistrustful