The difference between Affinity and Alliance

Affinity as a noun:

A natural attraction or feeling of kinship to a person or thing.

Affinity as a noun:

A family relationship through marriage of a relative (e.g. sister-in-law), as opposed to consanguinity (e.g. sister).

Affinity as a noun:

A kinsman or kinswoman of a such relationship; one who is affinal.

Affinity as a noun:

The fact of and manner in which something is related to another.

Affinity as a noun:

Any romantic relationship.

Affinity as a noun:

Any passionate love for something.

Affinity as a noun (taxonomy):

resemblances between biological populations; resemblances that suggest that they are of a common origin, type or stock.

Affinity as a noun (geology):

structural resemblances between minerals; resemblances that suggest that they are of a common origin or type.

Affinity as a noun (chemistry):

An attractive force between atoms, or groups of atoms, that contributes towards their forming bonds

Affinity as a noun (medicine):

The attraction between an antibody and an antigen

Affinity as a noun (computing):

tendency to keep a task running on the same processor in a symmetric multiprocessing operating system to reduce the frequency of cache misses

Affinity as a noun (geometry):

An automorphism of affine space.

Alliance as a noun (uncountable):

The state of being allied.

Alliance as a noun (countable):

The act of allying or uniting.

Alliance as a noun (countable):

A union or connection of interests between families, states, parties, etc., especially between families by marriage and states by compact, treaty, or league.

Alliance as a noun (countable):

Any union resembling that of families or states; union by relationship in qualities; affinity.

Alliance as a noun (with the [[definite article]]):

The persons or parties allied.

Alliance as a verb (obsolete):

To connect or unite by alliance; to ally.