keep vs observe

keep is a noun but observe is not a noun.

Word	Noun	Adjective	Verb	Adverb
keep	Yes	No	Yes	No
observe	No	No	Yes	No

As verbs, keep and observe are synonyms defined as:

Other synonyms of keep include maintain.

As verbs, keep and observe are synonyms defined as:

As verbs, keep and observe are synonyms defined as:

Other synonyms of keep include celebrate.

keep (noun)	observe (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)	observe (verb)
prevent (food) from rotting	stick to correctly or closely
prevent the action or expression of	make mention of
stick to correctly or closely	watch attentively
maintain by writing regular records	observe with care or pay close attention to
supply with necessities and support	discover or determine the existence, presence, or fact of by perception with the eyes
hold and prevent from leaving	follow with the eyes or the mind
retain possession of	show respect towards
look after; be the keeper of; have charge of	behave as expected during of holidays or rites
retain rights to	conform one's action or practice 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