blot vs stain

blot and stain both are nouns.

Word	Noun	Adjective	Verb	Adverb
blot	Yes	No	Yes	No
stain	Yes	No	Yes	No

As nouns, blot and stain are synonyms defined as:

Other synonyms of blot include smear, smirch, spot.

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

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

Other hyponyms of blot include splotch, defile, maculate, sully, tarnish, bespeckle, speckle, bespatter, spatter.

blot (noun)	stain (noun)
an act that brings discredit to the person who does it	an act that brings discredit to the person who does it
a blemish made by dirt	a soiled or discolored appearance
	a symbol of disgrace or infamy
	anything regarded as making something unclean
	(microscopy) a dye or other coloring material that is used in microscopy to make structures visible

blot (verb)	stain (verb)
dry (ink) with blotting paper	produce or leave stains
make a spot or mark onto	color with a liquid dye or tint
	color for microscopic study
	make dirty or spotty, as by exposure to air; also used metaphorically