to replace; to take the place of

to replace; to take over (a position or post)

to replace

to replace; alternately; in turn

to take turns (responsibility); to replace

stand-in (for lighting and camera setup)

rise and fall

(slang) sb who effectively articulates others' thoughts or feelings on their behalf

(neologism c. 2021) cheaper alternative; affordable alternative

to take over (from one another); to alternate; to replace; to relay

to substitute for sb in sitting an examination

succession (of changes in an ecological community); naturally evolving sequence

(poorly paid) ghostwriter or substitute calligrapher

body double (in nude scenes)

to take turns; to follow a rotating schedule

body double (in eating scenes)

(biology) alternation of generations; (fig.) generational succession; passing of the torch from one generation to the next

(of a position or title) to be passed down unaltered through generations within a family

to assume sb's name and take his place (idiom); to impersonate; to pose under a false name

to do everything oneself (idiom); not to allow others in on the act