blubber vs speak

blubber is a noun but speak is not a noun.

Word	Noun	Adjective	Verb	Adverb
blubber	Yes	No	Yes	No
speak	No	No	Yes	No

As verbs, speak is a hypernym of blubber; that is, speak is a word with a broader meaning than blubber:

Other hypernyms of blubber include mouth, talk, utter, verbalise, verbalize.

blubber (noun)	speak (noun)
excess bodily weight
an insulating layer of fat under the skin of whales and other large marine mammals; used as a source of oil

blubber (verb)	speak (verb)
cry or whine with snuffling	express in speech
utter while crying	exchange thoughts; talk with
	use language
	give a speech to
	make a characteristic or natural sound