Golomb's Gambits: Words with "uous" or "uity"

The following puzzle first appeared in April 1999.

  1. There are more than 30 English adjectives ending in –uous. How many can you list? (Note: Do not include rare negatives, like "unpresumptuous" or "unvoluptuous.")

  2. Which of the adjectives ending in –uous can be changed into nouns ending in –uity? Can you find at least 10? (Note: Some of the –uity words I include are listed in the dictionary as "rare.")

Answers:







1.

ambiguous

arduous

assiduous

congruous

conspicuous

contemptuous

contiguous

continuous

deciduous

discontinuous

disingenuous

fatuous

fructuous

impetuous

incestuous

incongruous

inconspicuous

ingenuous

innocuous

mellifluous

perspicuous

presumptuous

promiscuous

sensuous

sinuous

strenuous

sumptuous

superfluous

tempestuous

tenuous

tortuous

tumultuous

unambiguous

unctuous

vacuous

virtuous

voluptuous

2.

ambiguous/ambiguity

assiduous/assiduity

congruous/congruity

conspicuous/conspicuity

contiguous/contiguity

continuous/continuity

discontinuous/discontinuity

fatuous/fatuity

incongruous/incongruity

ingenuous/ingenuity

perspicuous/perspicuity

promiscuous/promiscuity

superfluous/superfluity

tenuous/tenuity

vacuous/vacuity