Alternative form of double whammy

(chemistry) A solid solution of two simple salts, often in a definite proportion

plural of double-click

Third-person singular simple present indicative form of double-click

plural of double agent

plural of double-decker

simple past tense and past participle of double-book

Third-person singular simple present indicative form of double-book

present participle of double-book

(transitive) To book or reserve something for two people simultaneously. / (reflexive) To make arrangements to do two things at the same time, such that it is impossible to keep both arrangements.