appear vs fulminate

appear is not a noun while fulminate is a noun.

Word	Noun	Adjective	Verb	Adverb
appear	No	No	Yes	No
fulminate	Yes	No	Yes	No

As verbs, fulminate is a hyponym of appear; that is, fulminate is a word with a more specific, narrower meaning than appear:

Other hyponyms of appear include gleam, occur.

appear (noun)	fulminate (noun)
	a salt or ester of fulminic acid

appear (verb)	fulminate (verb)
come into sight or view	cause to explode violently and with loud noise
be issued or published	come on suddenly and intensely
come into being or existence, or appear on the scene	criticize severely
appear as a character on stage or appear in a play, etc.
give a certain impression of being something or having a certain aspect
(of a proposition) seem to be true, probable, or apparent
present oneself formally, as before a (judicial) authority