scorch vs burn down

scorch is a noun but burn down is not a noun.

Word	Noun	Adjective	Verb	Adverb
scorch	Yes	No	Yes	No
burn down	No	No	Yes	No

As verbs, burn down is a hypernym of scorch; that is, burn down is a word with a broader meaning than scorch:

Other hypernyms of scorch include burn, fire.

scorch (noun)	burn down (noun)
a discoloration caused by heat
a surface burn
a plant disease that produces a browning or scorched appearance of plant tissues

scorch (verb)	burn down (verb)
burn slightly and superficially so as to affect color	burn completely; be consumed or destroyed by fire
make very hot and dry	destroy by fire
become scorched or singed under intense heat or dry conditions
destroy completely by or as if by fire
become superficially burned
subject to harsh criticism