Definitions: 

Although: Is used more commonly in formal writing and though in casual writing or communication. Though: Is used as a conjunction and an adverb which means ‘however’ or ‘nonetheless’, it cannot be used interchangeably with although.

Rules with Examples

1. When although and though are used as conjunctions to mean ‘in spite of’ or ‘instead of’, they can be used interchangeably. Ex. Although I did not win, I enjoyed participating in the contest.

2. When though is used as a conjunction and an adverb which means ‘however’ or ‘nonetheless’, it cannot be used interchangeably with although. Ex. She is not fond of music. She will come and hear me play the piano though.

3. Although is used more commonly in formal writing and though in casual writing or communication. Ex. Although the patient was unconscious, his pulse rate was normal. 4. You may use though to reduces some clauses and make the sentence clear and concise. Ex. Though unlikely, he tried to get his cash back.

5. You can introduce a verb in the sentence with although. Ex. Although bringing a bag was not mandatory, he decided he will bring one anyway. We hope this makes your task of choosing the right word between although and though easier.