"Cold vibes" is a phrase often used to describe an uncomfortable or unwelcoming atmosphere. However, there are several synonyms that can be used to convey a similar meaning. These include terms like "unfriendly," "icy," "distant," and "frosty." Other synonyms might include "chilly," "aloof," "reserved," or "standoffish." Depending on the context or situation, there might be other words that are more fitting. For example, if the atmosphere is tense or hostile, "tense" or "hostile" might be a better option. Ultimately, choosing the right synonym for "cold vibes" depends on the nuances of the situation and the specific feelings or emotions that are being conveyed.