single tax(n = noun.possession) - a system of taxation in which a tax is levied on a single commodity (usually land);
is a kind of revenue enhancement, tax, taxation

   A tax levied upon land alone, irrespective of improvements, -- advocated by certain economists as the sole source of public revenue.
"Whatever may be thought of Henry George's single-tax theory as a whole, there can be little question that a relatively higher assessment of ground rent, with corresponding relief for those who have made improvements, is a much-needed reform." [Webster 1913 Suppl.]

ad valorem tax, capital gains tax, council tax, death tax, declaration of estimated tax, departure tax, direct tax, estate tax, estimated tax, estimated tax return, excise tax, federal tax lien, franchise tax, gasoline tax, gift tax, hidden tax, income tax, income tax bracket, income tax return, indirect tax, inheritance tax, land tax, license tax, line single, line-drive single, nuisance tax, poll tax, progressive tax, property tax, sales tax, single, single bed, single combat, single cream, single crochet, single dwelling, single entry, single file, single handed, single minded, single out, single prop, single quote, single shell, single stitch, single supplement, stamp tax, state tax lien, tax, tax advantage, tax assessment, tax assessor, tax avoidance, tax base, tax benefit, tax bill, tax boost, tax bracket, tax break, tax certificate, tax collection, tax collector, tax credit, tax cut, tax deduction, tax evasion, tax exemption, tax form, tax haven, tax hike, tax income, tax law, tax liability, tax lien, tax policy, tax program, tax rate, tax return, tax revenue, tax shelter, tax system, tax write-off, transfer tax, value-added tax, withholding tax