capsule vs orb

capsule and orb both are nouns.

Word	Noun	Adjective	Verb	Adverb
capsule	Yes	No	Yes	No
orb	Yes	No	Yes	No

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

Other hyponyms of capsule include malpighian body, malpighian corpuscle, renal corpuscle, eyeball, lens capsule.

capsule (noun)	orb (noun)
a pill in the form of a small rounded gelatinous container with medicine inside	the ball-shaped capsule containing the vertebrate eye
a spacecraft designed to transport people and support human life in outer space	an object with a spherical shape
a small container
a pilot's seat in an airplane that can be forcibly ejected in the case of an emergency; then the pilot descends by parachute
a structure that encloses a body part
a shortened version of a written work
a dry dehiscent seed vessel or the spore-containing structure of e.g. mosses

capsule (verb)	orb (verb)
put in a short or concise form; reduce in volume	move in an orbit
enclose in a capsule