steam vs give off

steam is a noun but give off is not a noun.

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

As verbs, give off is a hypernym of steam; that is, give off is a word with a broader meaning than steam:

steam: emit steam
give off: give off, send forth, or discharge; as of light, heat, or radiation, vapor, etc.

Other hypernyms of steam include emit, give out.

steam (noun)	give off (noun)
water at boiling temperature diffused in the atmosphere

steam (verb)	give off (verb)
cook something by letting steam pass over it	have as a by-product
clean by means of steaming	give off, send forth, or discharge; as of light, heat, or radiation, vapor, etc.
get very agitated or angry
rise as vapor
travel by means of steam power
emit steam