The phrase "was consonant" describes a state of agreement or harmony between two or more things. Its antonyms, then, would be words or phrases that describe a lack of agreement, disharmony, or discord. Some possible antonyms for "was consonant" could include "was dissonant," "was conflicting," "was discordant," "was inconsistent," or "was divergent." Each of these terms suggests a lack of agreement or cooperation between different aspects or elements, and all serve to highlight the opposite of consonance. While consonance often conveys a sense of resolution or stability, its antonyms suggest confusion, disagreement, or upheaval instead.