21-letter words containing a, c, k
- to kill a mockingbird — a novel (1960) by Harper Lee.
- to sink without trace — If you say that someone or something sinks without trace or sinks without a trace, you mean that they stop existing or stop being successful very suddenly and completely.
- trustee in bankruptcy — a person appointed by a court to administer the property of a bankrupt.
- tuple space smalltalk — ["Using Tuple Space Communication in Distributed Object-Oriented Languages", S. Matsuoka et al, SIGPLAN Notices 23(11):276-284 (Nov 1988)].
- white-knuckle paddler — an inexpert and timid canoeist.
- workers' compensation — a government-sponsored insurance system, funded by contributions from employers, for compensating employees for injury or occupational disease suffered in connection with their employment