Noun

• S: (n) understudy, standby (an actor able to replace a regular performer when required)
• direct hypernym / inherited hypernym / sister term
• derivationally related form

Verb

• S: (v) understudy, alternate (be an understudy or alternate for a role)
• direct hypernym / inherited hypernym / sister term
• S: (v) memorize, memorise, con, learn (commit to memory; learn by heart) "Have you memorized your lines for the play yet?"
• S: (v) study, hit the books (learn by reading books) "He is studying geology in his room"; "I have an exam next week; I must hit the books now"
• S: (v) learn, larn, acquire (gain knowledge or skills) "She learned dancing from her sister"; "I learned Sanskrit"; "Children acquire language at an amazing rate"
• derivationally related form
• W: (n) understudy [Related to: understudy] (an actor able to replace a regular performer when required)
• W: (n) alternate [Related to: alternate] (someone who takes the place of another person)
• sentence frame