Collocations for voter - noun

eligible, registered
Only a quarter of registered voters actually voted in the election.

absentee (AmE)
overseas
floating (BrE), uncommitted, undecided
first-time, new
swing
likely, potential
ordinary
the feelings of ordinary voters

Labour, Republican, etc.
black, rural, young, etc.
primary (AmE)
state (AmE)

appeal to, attract, woo
attempts to appeal to undecided voters

persuade
convince, remind
urge, warn
influence, sway
register
disenfranchise

choose sb, elect sb, go for sb, pick sb
In this election, voters chose candidates who promised economic security.

back sb, favour/favor sb, prefer sb
participate in sth, turn out
More than two million voters participated in the election.

cast their vote, go to the polls, vote
want sth
approve sth, decide sth, pass sth, support sth
reject sth

turnout
Voter turnout was very low.

participation
registration
apathy, fatigue
intimidation
The opposition alleged voter intimidation by the army.

fraud
list, roll (AmE)