soar vs billow

soar and billow both are nouns.

Word	Noun	Adjective	Verb	Adverb
soar	Yes	No	Yes	No
billow	Yes	No	Yes	No

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

Other hyponyms of soar include wallow.

soar (noun)	billow (noun)
the act of rising upward into the air	a large sea wave

soar (verb)	billow (verb)
go or move upward	become inflated
fly upwards or high in the sky	rise and move, as in waves or billows
rise rapidly	rise up as if in waves
fly a plane without an engine	move with great difficulty
fly by means of a hang glider