supporter (e.g. of the arts); adherent; proponent
one's support (power) base; the base of one's support in an electorate
base support (e.g. for a party in an election); substrate; load bearing layer; supporting layer
non-support; disapproval (e.g. in an opinion poll)
broad support; wide-ranging support
supportive care; supportive therapy
support line; support level; supporting wire; subsidiary wire