acidophilus vs lactobacillus

acidophilus and lactobacillus both are nouns.

Word	Noun	Adjective	Verb	Adverb
acidophilus	Yes	No	No	No
lactobacillus	Yes	No	No	No

As nouns, lactobacillus is a hypernym of acidophilus; that is, lactobacillus is a word with a broader meaning than acidophilus:

acidophilus: a bacterium that is used to make yogurt and to supplement probiotics
lactobacillus: a Gram-positive rod-shaped bacterium that produces lactic acid (especially in milk)

Other hypernyms of acidophilus include probiotic, probiotic bacterium, probiotic flora, probiotic microflora.

acidophilus (noun)	lactobacillus (noun)
a bacterium that is used to make yogurt and to supplement probiotics	a Gram-positive rod-shaped bacterium that produces lactic acid (especially in milk)