rank: He ranked first in the class. /The railroad novel was not treated as the first-rank novel.
discrete(separate): A computer can perform millions of discrete functions per second.
symmetry(balance, harmony)
sequence(procession, progression)
dual(double, twofold): This stove has dual ovens, so you can bake bread and roast meat at the same time.
induction
inference
circular(circuitous, roundabout): The carpenter used a special saw to cut a circular hole.
circulate: The rumor circulated through the office.
circulation: A tight ring cut off circulation to my finger.
probability
qualitative
dispersion
vertical(perpendicular, upright)
plumb(straight, vertical)
upright(vertical, upstanding): An empty sack cannot stand upright.
cubic
circuitous(indirect, roundabout): You could tell Mary was evading our question when she gave a circuitous response.
facet: The stonecutter decided to improve the rough diamond by providing it with several facets.
sphere(ball, globe): The earth is usually represented by a sphere.
loop(circle, ring)
triangle
circumference: The circumference of the round table is five feet.
cone: The top of a cone comes to a sharp point.
caliber
diameter
figure(design, shape)
circle
cube
column
angle
area
ellipse
diagram(sketch, drawing): A good diagram helped me assemble the bike.
polygon
intersect(cross, meet): These two fences intersect at the creek.
radius
rectangle
square
parallel: His paintings parallels that of Qi Baishi.
deduction
degree
geometry
mathematics
arithmetic: Arithmetic is a basic school subject.
statistics
even(odd): The children skated on the sidewalk's even surface.
decimal: The metric system is a decimal system.
ratio(proportion, rate): The ratio of men to women is 3 to 1.
estimate(gauge, compute): I estimate that Tom will be promoted to department manager.
calculate(count): Mary calculated her monthly expense.
enumerate(count, numerate): Sam can enumerate all the presidents of the United States.
evaluate(estimate, assess): The assessor evaluated the plot of land before Anne sold it.
variant(variable)
variable
abacus
aggregate
sum
calculation
calculator
calculus
digit
function
subtract(deduct): If you subtract 2 from 6, you get 4.
addition
minus
multiply
multiplication: multiplication table
numeral
percentage
plus
equation: 1+2=3 is a simple equation.
quarter: A quarter of a century would be 25 years.
fraction
divide: The woman's estate was divided among her children.
Not ignorance, but the ignorance of ignorance, is the death of knowledge. –Whitehead