muller vs vessel

muller and vessel both are nouns.

Word	Noun	Adjective	Verb	Adverb
muller	Yes	No	No	No
vessel	Yes	No	No	No

As nouns, vessel is a hypernym of muller; that is, vessel is a word with a broader meaning than muller:

muller (noun)	vessel (noun)
a heavy tool of stone or iron (usually with a flat base and a handle) that is used to grind and mix material (as grain or drugs or pigments) against a slab of stone	a craft designed for water transportation
a vessel in which wine is mulled	an object used as a container (especially for liquids)
a reflective thinker characterized by quiet contemplation	a tube in which a body fluid circulates