drivel vs saliva

drivel and saliva both are nouns.

Word	Noun	Adjective	Verb	Adverb
drivel	Yes	No	Yes	No
saliva	Yes	No	No	No

As nouns, saliva is a hypernym of drivel; that is, saliva is a word with a broader meaning than drivel:

drivel: saliva spilling from the mouth
saliva: a clear liquid secreted into the mouth by the salivary glands and mucous glands of the mouth; moistens the mouth and starts the digestion of starches

Other hypernyms of drivel include spit, spittle.

drivel (noun)	saliva (noun)
saliva spilling from the mouth	a clear liquid secreted into the mouth by the salivary glands and mucous glands of the mouth; moistens the mouth and starts the digestion of starches
a worthless message

drivel (verb)	saliva (verb)
let saliva drivel from the mouth