1. than - Adverb
2. than - Preposition
3. than - Conjunction
5. Than - Proper noun
A particle expressing comparison, used after certain adjectives and adverbs which express comparison or diversity, as more, better, other, otherwise, and the like. It is usually followed by the object compared in the nominative case. Sometimes, however, the object compared is placed in the objective case, and than is then considered by some grammarians as a preposition. Sometimes the object is expressed in a sentence, usually introduced by that; as, I would rather suffer than that you should want.
Then. See Then.
Source: Webster's dictionaryWise men learn more from fools than fools from the wise. Cato the Elder
Dead people receive more flowers than the living ones because the regret is stronger than gratitude. Anne Frank
The whole is greater than the sum of its parts. Aristotle
To a dog a bone has more value than a pearl. Filipino Proverb
A teacher is better than two books. German Proverb
The pen is mightier than the sword. Dutch Proverb