The phrase "be suitable" can be replaced by various synonyms to convey the same meaning in different contexts. Some of the synonyms for "be suitable" are appropriate, fitting, proper, relevant, and compatible. These words can be used interchangeably to indicate a good fit or alignment with a particular situation, purpose, or criteria. For example, a dress code might require appropriate attire for a particular event, a job applicant should possess relevant skills, or a software program should be compatible with various devices. The choice of synonym depends on the nuance and tone of the message being conveyed, as well as the audience and context of communication.