flow vs flood

flow and flood both are nouns.

Word	Noun	Adjective	Verb	Adverb
flow	Yes	No	Yes	No
flood	Yes	No	Yes	No

As nouns, flood is a hyponym of flow; that is, flood is a word with a more specific, narrower meaning than flow:

Other hyponyms of flow include release, spill, spillage, outpouring, overflow.

As verbs, flood is a hypernym of flow; that is, flood is a word with a broader meaning than flow:

flow (noun)	flood (noun)
the act of flowing or streaming; continuous progression	the act of flooding; filling to overflowing
the motion characteristic of fluids (liquids or gases)	a large flow
dominant course (suggestive of running water) of successive events or ideas	light that is a source of artificial illumination having a broad beam; used in photography
any uninterrupted stream or discharge	the occurrence of incoming water (between a low tide and the following high tide)
the monthly discharge of blood from the uterus of nonpregnant women from puberty to menopause	the rising of a body of water and its overflowing onto normally dry land
something that resembles a flowing stream in moving continuously	an overwhelming number or amount
the amount of fluid that flows in a given time

flow (verb)	flood (verb)
undergo menstruation	cover with liquid, usually water
cover or swamp with water	become filled to overflowing
fall or flow in a certain way	fill quickly beyond capacity; as with a liquid
move along, of liquids	supply with an excess of
move or progress freely as if in a stream
cause to flow
be abundantly present