- invaluable
- adj1. precious, valuable, incalculably valuable, inestimably valuable, priceless, beyond price; dear, expensive, costly, high, high-priced, Inf. worth a pretty penny, Inf. worth its weight in gold, Inf. worth a king's ransom.2. excellent, superexcellent, superlative, Inf. super; rare, golden, unusual, exceptional, extraordinary, unparalleled, unequaled, inimitable, matchless, peerless, unique, one of a kind; exquisite, superfine, capital, Inf. first-class, first-rate, Inf. top-drawer.3. useful, very useful, nonexpendable, essential, requisite, required, needful, imperative, indispensable.
A Note on the Style of the synonym finder. 2014.