spiel vs speak

spiel is a noun but speak is not a noun.

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

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

Other hypernyms of spiel include talk.

spiel (noun)	speak (noun)
plausible glib talk (especially useful to a salesperson)

spiel (verb)	speak (verb)
speak at great length (about something)	express in speech
replay (as a melody)	exchange thoughts; talk with
	use language
	give a speech to
	make a characteristic or natural sound