fellowship vs association

fellowship and association both are nouns.

Word	Noun	Adjective	Verb	Adverb
fellowship	Yes	No	No	No
association	Yes	No	No	No

As nouns, association is a hypernym of fellowship; that is, association is a word with a broader meaning than fellowship:

fellowship (noun)	association (noun)
an association of people who share common beliefs or activities	the act of consorting with or joining with others
money granted (by a university or foundation or other agency) for advanced study or research	the process of bringing ideas or events together in memory or imagination
the state of being with someone	a formal organization of people or groups of people
	(ecology) a group of organisms (plants and animals) that live together in a certain geographical region and constitute a community with a few dominant species
	(chemistry) any process of combination (especially in solution) that depends on relatively weak chemical bonding
	a relation resulting from interaction or dependence
	a social or business relationship
	the state of being connected together as in memory or imagination