Because “then” and “than” are homophones (words that sound alike), they are often confused. Some tips on telling them apart.
Then vs. Than: the difference
Then
Is an adverb: A word that describes, gives more information about a verb, adjective, adverb or phrase. When spoken it rhymes with 'hen'.
Than
Is a preposition or conjunction: A word that is used before a noun, a noun phrase, or a pronoun, connecting it to another word. When spoken it rhymes with 'man'.
Then vs. Than: the definitions
Then
- At that time (in the past or in the future). 
- Next or after that. 
- In addition. 
Than
- Used to join two parts of a comparison. 
- Used with “more” or “less” to compare numbers or amounts. 
Then vs. Than: the synonyms
Then
Could also mean (synonyms): Again, later, next, at that moment, soon after, at that time.
Than
There are no synonyms for this word
Then vs. Than: in a sentence
Then
- The toddler touched my cheek and then pinched it hard. 
- Last night it rained and then turned cold and humid. 
- She walked away then, leaving all her belongings behind. 
- “What do you hope to achieve from this, then?” she asked him out of frustration. 
- Thank you,” Jane said and then blushed because she wasn’t used to compliments. 
Than
- I think she loves Indian food more than I do. 
- She performed much better than I expected. 
- I can cook dinner in less than an hour. 
- Contrary to popular belief, I believe that Jane is a better actress than Kim. 
- Do you think the colour red suits me better than blue? 
