RichThesaurus
at no cost
at no cost
synonyms
free of charge
for nothing
free
without charge
for free
gratis
on the house
without payment
complimentary
gratuitous
unsalaried
unpaid
volunteer
unrewarded
voluntary
buckshee
pro bono (publico)
without paying
gratuitously
freely
courtesy
comp
pro bono
for the common good
at no cost
antonyms
paid for
paid
professional
for a fee
expensive