WordNet sense 1 (an idea or conclusion having general application):

generality, generalisation

WordNet sense 2 (the process of formulating general concepts by abstracting common properties of instances):

abstraction

WordNet sense 3 (reasoning from detailed facts to general principles):

induction, inductive reasoning

WordNet sense 4 ((psychology) transfer of a response learned to one stimulus to a similar stimulus):

stimulus generalisation, stimulus generalization