spiel vs modulate

spiel is a noun but modulate is not a noun.

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

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

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

spiel (verb)	modulate (verb)
speak at great length (about something)	adjust the pitch, tone, or volume of
replay (as a melody)	fix or adjust the time, amount, degree, or rate of
	vary the frequency, amplitude, phase, or other characteristic of (electromagnetic waves)
	vary the pitch of one's speech
	change the key of, in music