fill vs slake

fill is a noun but slake is not a noun.

Word	Noun	Adjective	Verb	Adverb
fill	Yes	No	Yes	No
slake	No	No	Yes	No

As verbs, slake is a hyponym of fill; that is, slake is a word with a more specific, narrower meaning than fill:

fill (noun)	slake (noun)
a quantity sufficient to satisfy
any material that fills a space or container

fill (verb)	slake (verb)
become full	make less active or intense
make full, also in a metaphorical sense	cause to heat and crumble by treatment with water
plug with a substance	satisfy (thirst)
fill to satisfaction
eat until one is sated
fill, satisfy or meet a want or need or condition or restriction
assume, as of positions or roles
appoint someone to (a position or a job)
occupy the whole of