Related Clues:

• Subjects of sentences, usually
• Grammar book chapter
• Word types
• Words ending in 'o' in Esperanto
• Many Latin ones end in -are
• Sentence subjects, e.g
• Gin and tonic, e.g
• Stop, drop and roll, e.g
• They may be irregular
• No Age album not about verbs?
• Some of them are proper
• Words that may be irregular
• Substantives
• Bread and butter, for two
• Words that aren't nouns