smear vs malignment

smear and malignment both are nouns.

Word	Noun	Adjective	Verb	Adverb
smear	Yes	No	Yes	No
malignment	Yes	No	No	No

As nouns, smear and malignment are synonyms defined as:

Other synonyms of smear include vilification.

smear (noun)	malignment (noun)
an act that brings discredit to the person who does it	slanderous defamation
a blemish made by dirt
a thin tissue or blood sample spread on a glass slide and stained for cytologic examination and diagnosis under a microscope
slanderous defamation

smear (verb)	malignment (verb)
charge falsely or with malicious intent; attack the good name and reputation of someone
make a smudge on; soil by smudging
stain by smearing or daubing with a dirty substance
cover (a surface) by smearing (a substance) over it