grass vs open

grass and open both are nouns.

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

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

Other hypernyms of grass include spread, spread out, unfold.

grass (noun)	open (noun)
street names for marijuana	information that has become public
bulky food like grass or hay for browsing or grazing horses or cattle	a tournament in which both professionals and amateurs may play
a police informer who implicates many people	a clear or unobstructed space or expanse of land or water
narrow-leaved green herbage: grown as lawns; used as pasture for grazing animals; cut and dried as hay	where the air is unconfined

grass (adjective)	open (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

grass (verb)	open (verb)
give away information about somebody	make available
shoot down, of birds	become available
feed with grass	make the opening move
cover with grass	cause to open or to become open
spread out clothes on the grass to let it dry and bleach	become open
	spread out or open from a closed or folded state
	display the contents of a file or start an application as on a computer
	afford access to
	start to operate or function or cause to start operating or functioning
	begin or set in action, of meetings, speeches, recitals, etc.
	have an opening or passage or outlet