altruist vs philanthropist

altruist and philanthropist both are nouns.

Word	Noun	Adjective	Verb	Adverb
altruist	Yes	No	No	No
philanthropist	Yes	No	No	No

As nouns, altruist and philanthropist are synonyms defined as:

altruist and philanthropist: someone who makes charitable donations intended to increase human well-being

altruist (noun)	philanthropist (noun)
someone who makes charitable donations intended to increase human well-being	someone who makes charitable donations intended to increase human well-being