odourise vs stink up

odourise and stink up both are verbs.

Word	Noun	Adjective	Verb	Adverb
odourise	No	No	Yes	No
stink up	No	No	Yes	No

As verbs, stink up is a hyponym of odourise; that is, stink up is a word with a more specific, narrower meaning than odourise:

Other hyponyms of odourise include smell up, stink out, aromatise, aromatize, perfume, cense, incense, thurify.

odourise (verb)	stink up (verb)
cause to smell or be smelly	cause to smell bad; fill with a bad smell