There is only one verb 'to tolerate' and one adjective 'tolerant,'
but the two nouns 'tolerance' and 'toleration' have evolved slightly
different meanings. Tolerance is an attitude of mind that implies
non-judgmental acceptance of different lifestyles or beliefs, whereas toleration implies putting up with something that one disapproves of.
Historically, most incidents and writings pertaining to toleration
involve the status of minority and dissenting viewpoints in relation to a
dominant state religion.
In the twentieth century and after, analysis of the doctrine of
toleration has been expanded to include political and ethnic groups,
homosexuals and other minorities, and human rights embodies the principle of legally enforced toleration.