prosthesis vs implant

prosthesis and implant both are nouns.

Word	Noun	Adjective	Verb	Adverb
prosthesis	Yes	No	No	No
implant	Yes	No	Yes	No

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

Other hyponyms of prosthesis include glass eye, obturator, leg, peg, pegleg, wooden leg, vascular conduit, vascular prosthesis.

prosthesis (noun)	implant (noun)
corrective consisting of a replacement for a part of the body	a prosthesis placed permanently in tissue

prosthesis (verb)	implant (verb)
	put firmly in the mind
	fix or set securely or deeply
	become attached to and embedded in the uterus