keep vs wash out

keep is a noun but wash out is not a noun.

Word	Noun	Adjective	Verb	Adverb
keep	Yes	No	Yes	No
wash out	No	No	Yes	No

As verbs, wash out is a hyponym of keep; that is, wash out is a word with a more specific, narrower meaning than keep:

keep: stop (someone or something) from doing something or being in a certain state
wash out: prevent or interrupt due to rain

keep (noun)	wash out (noun)
the main tower within the walls of a medieval castle or fortress
a cell in a jail or prison
the financial means whereby one lives

keep (verb)	wash out (verb)
prevent (food) from rotting	deplete of strength or vitality
prevent the action or expression of	lose color in the process of being washed
stick to correctly or closely	drain off the color in the course of laundering
maintain by writing regular records	remove by the application of water or other liquid and soap or some other cleaning agent
supply with necessities and support	wear or destroy by the force of water
hold and prevent from leaving	wash free from unwanted substances, such as dirt
retain possession of	prevent or interrupt due to rain
look after; be the keeper of; have charge of
retain rights to
maintain for use and service
have as a supply
store or keep customarily
stop (someone or something) from doing something or being in a certain state
allow to remain in a place or position or maintain a property or feature
conform one's action or practice to
behave as expected during of holidays or rites
cause to continue in a certain state, position, or activity
supply with room and board
maintain in safety from injury, harm, or danger
fail to spoil or rot
continue a certain state, condition, or activity
to rear