opening vs os

opening and os both are nouns.

opening is an adjective but os is not an adjective.

Word	Noun	Adjective	Verb	Adverb
opening	Yes	Yes	No	No
os	Yes	No	No	No

As nouns, os is a hyponym of opening; that is, os is a word with a more specific, narrower meaning than opening:

opening: an aperture or hole that opens into a bodily cavity
os: a mouth or mouthlike opening

Other hyponyms of opening include vent, blastopore, aortic orifice, stoma, porta hepatis, spiracle, mouth, cervix, cervix uteri, uterine cervix, fenestra, cardia, introitus, external orifice, urethral orifice, pylorus, anus, fontanel, fontanelle, soft spot, naris, rima.

opening (noun)	os (noun)
a recognized sequence of moves at the beginning of a game of chess	rigid connective tissue that makes up the skeleton of vertebrates
the act of opening something	a mouth or mouthlike opening
becoming open or being made open
the first of a series of actions
a vacant or unobstructed space that is man-made
an entrance equipped with a hatch; especially a passageway between decks of a ship
an aperture or hole that opens into a bodily cavity
a possible alternative
the initial part of the introduction
the first performance (as of a theatrical production)
a ceremony accompanying the start of some enterprise
an open or empty space in or between things
opportunity especially for employment or promotion

opening (adjective)	os (adjective)
first or beginning

Difference between opening and os

Words related to "opening"

Words related to "os"

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