The word "relativities" refers to the conceptual understanding of something in relation to other things, and the concept of there being no absolute truths or values. The antonyms of "relativities" would therefore be absolutes, objectivity, reality, certainty, or definiteness. These words refer to the opposite of what "relativities" convey, as they suggest a fixed and objective truth that is not influenced by various interpretive factors. Antonyms of "relativities" could also include concreteness, tangibility, specificity, precision, or finality, as these terms refer to the idea of something being clearly defined and not subject to interpretation or ambiguity.