blob vs tarnish

blob and tarnish both are nouns.

Word	Noun	Adjective	Verb	Adverb
blob	Yes	No	Yes	No
tarnish	Yes	No	Yes	No

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

blob: make a spot or mark onto
tarnish: make dirty or spotty, as by exposure to air; also used metaphorically

Other hyponyms of blob include splotch, defile, maculate, stain, sully, bespeckle, speckle, bespatter, spatter.

blob (noun)	tarnish (noun)
an indistinct shapeless form	discoloration of metal surface caused by oxidation

blob (verb)	tarnish (verb)
make a spot or mark onto	make dirty or spotty, as by exposure to air; also used metaphorically