Other words for "but" vary depending on the sense in which "but" is used. The word "but" mainly has three senses: contrast, exception, and an exclusive meaning (only). For contrast (showing contradiction or opposition), synonyms include:

• yet
• however
• though
• although
• nevertheless
• even so
• nonetheless
• notwithstanding
• still
• on the other hand

For the sense of exception (meaning except), synonyms include:

• except (for)
• save
• barring
• besides
• excluding
• other than
• aside from
• without

For an exclusive or restrictive meaning (only):

• only
• just
• simply
• merely

Many of these can be used interchangeably with "but" depending on context, especially for linking contrasting ideas or indicating exceptions.