stain vs blot

stain and blot both are nouns.

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

As nouns, stain and blot are synonyms defined as:

Other synonyms of stain include smear, smirch, spot.

As verbs, blot is a hypernym of stain; that is, blot is a word with a broader meaning than stain:

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

Other hypernyms of stain include blob, fleck, spot.

stain (noun)	blot (noun)
an act that brings discredit to the person who does it	an act that brings discredit to the person who does it
a soiled or discolored appearance	a blemish made by dirt
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

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