open vs yield

open and yield both are nouns.

Word	Noun	Adjective	Verb	Adverb
open	Yes	Yes	Yes	No
yield	Yes	No	Yes	No

As verbs, yield is a hypernym of open; that is, yield is a word with a broader meaning than open:

Other hypernyms of open include afford, give.

open (noun)	yield (noun)
information that has become public	production of a certain amount
a tournament in which both professionals and amateurs may play	an amount of a product
a clear or unobstructed space or expanse of land or water	the income or profit arising from such transactions as the sale of land or other property
where the air is unconfined	the quantity of something (as a commodity) that is created (usually within a given period of time)

open (adjective)	yield (adjective)
ready or willing to receive favorably
affording unobstructed entrance and exit; not shut or closed
affording free passage or access
(set theory) of an interval that contains neither of its endpoints
open and observable; not secret or hidden
used of mouth or eyes
ready for business
not having been filled
(of textures) full of small openings or gaps
openly straightforward and direct without reserve or secretiveness
not requiring union membership
open to or in view of all
possibly accepting or permitting
without undue constriction as from e.g. tenseness or inhibition
having no protecting cover or enclosure
affording free passage or view
with no protection or shield
accessible to all
not sealed or having been unsealed
not brought to a conclusion; subject to further thought
not defended or capable of being defended

open (verb)	yield (verb)
make available	end resistance, as under pressure or force
become available	consent reluctantly
make the opening move	be willing to concede
cause to open or to become open	cease opposition; stop fighting
become open	be flexible under stress of physical force
spread out or open from a closed or folded state	give or supply
display the contents of a file or start an application as on a computer	cause to happen or be responsible for
afford access to	move in order to make room for someone for something
start to operate or function or cause to start operating or functioning	bring in
begin or set in action, of meetings, speeches, recitals, etc.	give over; surrender or relinquish to the physical control of another
have an opening or passage or outlet	be the cause or source of
	give in, as to influence or pressure
	be fatally overwhelmed