phototropic bacteria vs phototrophic bacteria

phototropic bacteria and phototrophic bacteria both are nouns.

Word	Noun	Adjective	Verb	Adverb
phototropic bacteria	Yes	No	No	No
phototrophic bacteria	Yes	No	No	No

As nouns, phototropic bacteria and phototrophic bacteria are synonyms defined as:

phototropic bacteria and phototrophic bacteria: green and purple bacteria; energy for growth is derived from sunlight; carbon is derived from carbon dioxide or organic carbon

phototropic bacteria (noun)	phototrophic bacteria (noun)
green and purple bacteria; energy for growth is derived from sunlight; carbon is derived from carbon dioxide or organic carbon	green and purple bacteria; energy for growth is derived from sunlight; carbon is derived from carbon dioxide or organic carbon