"Blat out" is a phrase that often means to speak loudly and in a blunt or brash manner. However, there are several synonyms that can be used to vary the tone and intensity of the phrase. For instance, to talk forthrightly, one could use "spill out" or "pronounce." If the emphasis is more on volume than directness, one might opt for "shout out," "yell out," or "bellow." Alternately, for a more measured approach, one could use "declare," "assert," or "announce." Each synonym provides a different nuance, allowing the speaker to tailor their language for a specific audience or situation.