When it comes to finding synonyms for the word "throatiest", there are a few options to consider. Firstly, one could use "raspiest" to describe a deep and rough voice, similar to the sound produced from the throat. Alternatively, "huskiest" could be used to convey a similar meaning, suggesting a deep and hoarse quality. Another possible synonym would be "gravelly", which describes a voice that is rough, harsh, and somewhat low-pitched. Lastly, "hoarse" could be employed to refer to a voice characterized by a rough and strained quality, typically due to illness or excessive use. Overall, these alternatives capture the essence of a "throatiest" voice in different ways.