attraction vs affinity

attraction and affinity both are nouns.

Word	Noun	Adjective	Verb	Adverb
attraction	Yes	No	No	No
affinity	Yes	No	No	No

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

attraction: the quality of arousing interest; being attractive or something that attracts
affinity: a natural attraction or feeling of kinship

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

attraction (noun)	affinity (noun)
the quality of arousing interest; being attractive or something that attracts	inherent resemblance between persons or things
a characteristic that provides pleasure and attracts	a natural attraction or feeling of kinship
an entertainment that is offered to the public	the force attracting atoms to each other and binding them together in a molecule
an entertainer who attracts large audiences	(immunology) the attraction between an antigen and an antibody
the force by which one object attracts another	(anthropology) kinship by marriage or adoption; not a blood relationship
	(biology) state of relationship between organisms or groups of organisms resulting in resemblance in structure or structural parts
	a close connection marked by community of interests or similarity in nature or character