malt vs maltster

malt and maltster both are nouns.

Word	Noun	Adjective	Verb	Adverb
malt	Yes	No	Yes	No
maltster	Yes	No	No	No

malt (noun)	maltster (noun)
a cereal grain (usually barley) that is kiln-dried after having been germinated by soaking in water; used especially in brewing and distilling	a maker of malt
a lager of high alcohol content; by law it is considered too alcoholic to be sold as lager or beer
a milkshake made with malt powder

malt (verb)	maltster (verb)
convert into malt
turn into malt, become malt
convert grain into malt
treat with malt or malt extract