The phrase "think nothing of it" is a common expression used to tell someone that their actions or efforts are not a big deal and that no gratitude or praise is necessary. However, there are several synonyms for this phrase that can be used interchangeably, such as "no worries," "don't mention it," "it's nothing," "not at all," "you're welcome," "no problem," and "it was my pleasure." These synonyms can be used in a similar context and can convey the same meaning of dismissing any need for thanks or appreciation. Overall, these phrases are great for maintaining polite and courteous conversations with others.