4 Words to use with rapidity

The population in the newly settled regions increased with a rapidity hitherto unexampled; and this rapidity, alike in growth of population and in territorial expansion, gave the West full weight in the national councils.

"It is affecting to us to think with what astonishing rapidity slavery is extending itself upon the Continent of North America, and how from year to year the slave population is increasing among you.

On the contrary, his eagles took flight with a rapidity suggestive of the old adage that "gold hath wings," and when, long after midnight, he stood upon the deserted street alone with Philip Searle and his reflections, he was a sadder and a soberer man.

The conservatives found ease better than exactitude, the trouble of thinking great, the agony of deciding harrowing, and the alternative of smiling cynically and being liberal so much easierand the warm weather coming on with a rapidity-wearying to contemplate.

4 Words to use with  rapidity