circularize vs sow

circularize is not a noun while sow is a noun.

Word	Noun	Adjective	Verb	Adverb
circularize	No	No	Yes	No
sow	Yes	No	Yes	No

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

Other hyponyms of circularize include podcast, generalise, generalize, popularise, popularize, vulgarise, vulgarize, carry, run.

circularize (noun)	sow (noun)
	an adult female hog

circularize (verb)	sow (verb)
make circular	introduce into an environment
cause to become widely known	place (seeds) in or on the ground for future growth
distribute circulars to	place seeds in or on (the ground)
canvass by distributing letters
canvass by using a questionnaire