emulsifier vs wetter

emulsifier and wetter both are nouns.

Word	Noun	Adjective	Verb	Adverb
emulsifier	Yes	No	No	No
wetter	Yes	No	No	No

As nouns, wetter is a hypernym of emulsifier; that is, wetter is a word with a broader meaning than emulsifier:

emulsifier: a surface-active agent that promotes the formation of an emulsion
wetter: a chemical agent capable of reducing the surface tension of a liquid in which it is dissolved

Other hypernyms of emulsifier include surface-active agent, surfactant, wetting agent.

emulsifier (noun)	wetter (noun)
a surface-active agent that promotes the formation of an emulsion	a workman who wets the work in a manufacturing process
	someone suffering from enuresis; someone who urinates while asleep in bed
	a chemical agent capable of reducing the surface tension of a liquid in which it is dissolved