malodour vs reek

malodour and reek both are nouns.

Word	Noun	Adjective	Verb	Adverb
malodour	Yes	No	No	No
reek	Yes	No	Yes	No

As nouns, malodour and reek are synonyms defined as:

Other synonyms of malodour include fetor, foetor, malodor, mephitis, stench, stink.

malodour (noun)	reek (noun)
a distinctive odor that is offensively unpleasant	a distinctive odor that is offensively unpleasant

malodour (verb)	reek (verb)
	be wet with sweat or blood, as of one's face
	smell badly and offensively
	have an element suggestive (of something)
	give off smoke, fumes, warm vapour, steam, etc.