llama vs alpaca

llama and alpaca both are nouns.

Word	Noun	Adjective	Verb	Adverb
llama	Yes	No	No	No
alpaca	Yes	No	No	No

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

llama: wild or domesticated South American cud-chewing animal related to camels but smaller and lacking a hump
alpaca: domesticated llama with long silky fleece; believed to be a domesticated variety of the guanaco

Other hyponyms of llama include domestic llama, Lama peruana, guanaco, Lama guanicoe, Lama pacos.

llama (noun)	alpaca (noun)
wild or domesticated South American cud-chewing animal related to camels but smaller and lacking a hump	domesticated llama with long silky fleece; believed to be a domesticated variety of the guanaco
	a thin glossy fabric made of the wool of the Lama pacos, or made of a rayon or cotton imitation of that wool
	wool of the alpaca