The word "dipsier" means someone who is very thirsty and always in need of a drink. There are several synonyms for this word, including "thirsty," "parched," "dehydrated," "dry," and "famished." Other possible synonyms include "needing hydration," "craving water," "aching for a drink," and "thirst-ridden." If you are looking for a more formal synonym, you could use "polydipsic," which refers to someone who has an excessive or abnormal thirst. Regardless of which synonym you choose, they all convey the same basic concept of someone who is desperately in need of liquids to quench their thirst.