- Two angles whose sum is 90°.互余角：两个角的和等于90°
- companionships
- companionway
- companionways
- company
- company-grade officer
- companying
- company man
- company town
- company woman
- compar.
- comparable
- comparable worth
- comparatist
- comparatists
- comparative
- comparative method
- comparatives
- comparator
- comparators
- compare
- compared
- compares
- comparing
- comparison
- comparisons