give off vs reek

give off is not a noun while reek is a noun.

Word	Noun	Adjective	Verb	Adverb
give off	No	No	Yes	No
reek	Yes	No	Yes	No

As verbs, reek is a hyponym of give off; that is, reek is a word with a more specific, narrower meaning than give off:

give off: give off, send forth, or discharge; as of light, heat, or radiation, vapor, etc.
reek: give off smoke, fumes, warm vapour, steam, etc.

Other hyponyms of give off include effuse, reflect, shine, spark, sparkle, radiate, scintillate, fume, smoke, shoot, ray, steam.

give off (noun)	reek (noun)
	a distinctive odor that is offensively unpleasant

give off (verb)	reek (verb)
have as a by-product	be wet with sweat or blood, as of one's face
give off, send forth, or discharge; as of light, heat, or radiation, vapor, etc.	smell badly and offensively
	have an element suggestive (of something)
	give off smoke, fumes, warm vapour, steam, etc.