drowse vs nod

drowse and nod both are nouns.

Word	Noun	Adjective	Verb	Adverb
drowse	Yes	No	Yes	No
nod	Yes	No	Yes	No

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

drowse (noun)	nod (noun)
a light fitful sleep	the act of nodding the head
	a sign of assent or salutation or command

drowse (verb)	nod (verb)
be on the verge of sleeping	be almost asleep
sleep lightly or for a short period of time	let the head fall forward through drowsiness
	lower and raise the head, as to indicate assent or agreement or confirmation
	express or signify by nodding
	sway gently back and forth, as in a nodding motion