hold vs understanding

hold and understanding both are nouns.

Word	Noun	Adjective	Verb	Adverb
hold	Yes	No	Yes	No
understanding	Yes	Yes	No	No

As nouns, understanding is a hypernym of hold; that is, understanding is a word with a broader meaning than hold:

hold: understanding of the nature or meaning or quality or magnitude of something
understanding: the cognitive condition of someone who understands

Other hypernyms of hold include apprehension, discernment, savvy.

hold (noun)	understanding (noun)
the act of grasping	the capacity for rational thought or inference or discrimination
the appendage to an object that is designed to be held in order to use or move it	the cognitive condition of someone who understands
a cell in a jail or prison	an inclination to support or be loyal to or to agree with an opinion
the space in a ship or aircraft for storing cargo	the statement (oral or written) of an exchange of promises
a stronghold
power by which something or someone is affected or dominated
understanding of the nature or meaning or quality or magnitude of something
a state of being confined (usually for a short time)
time during which some action is awaited

hold (adjective)	understanding (adjective)
	characterized by understanding based on comprehension and discernment and empathy

hold (verb)	understanding (verb)
keep from exhaling or expelling
keep in mind or convey as a conviction or view
hold the attention of
assert or affirm
remain committed to
declare to be
bind by an obligation; cause to be indebted
be in accord; be in agreement
aim, point, or direct
protect against a challenge or attack
drink alcohol without showing ill effects
have or hold in one's hands or grip
be the physical support of; carry the weight of
support or hold in a certain manner
to close within bounds, or otherwise limit or deprive of free movement
cover as for protection against noise or smell
organize or be responsible for
maintain (a theory, thoughts, or feelings)
cause to come to an abrupt stop
have or possess, either in a concrete or an abstract sense
secure and keep for possible future use or application
have rightfully; of rights, titles, and offices
arrange for and reserve (something for someone else) in advance
keep from departing
take and maintain control over, often by violent means
lessen the intensity of; temper; hold in restraint; hold or keep within limits
cause to continue in a certain state, position, or activity
remain in a certain state, position, or condition
be valid, applicable, or true
be pertinent or relevant or applicable
have room for; hold without crowding
have as a major characteristic
resist or confront with resistance
stop dealing with
contain or hold; have within
be capable of holding or containing