Dictionary.com
Thesaurus.com

inequity vs. iniquity

[in-ek-wi-tee] / ɪnˈɛk wɪ ti /

noun

plural

inequities
  1. lack of equity; unfairness; favoritism or bias.

  2. an unfair circumstance or proceeding.

[ih-nik-wi-tee] / ɪˈnɪk wɪ ti /

noun

plural

iniquities
  1. gross injustice or wickedness.

    Synonyms:
    knavery, depravity, infamy, evildoing
  2. a violation of right or duty; wicked act; sin.