| Anniversary | Preferred Term |
| 1/2 yearly | Biannual |
| 1 year | Annual |
| 2 years | Biennial |
| 3 years | Triennial |
| 4 years | Quadrennial |
| 5 years | Quinquennial |
| 6 years | Sexennial |
| 7 years | Septennial |
| 8 years | Octennial |
| 9 years | Novennial |
| 10 years | Decennial |
| 11 years | Undecennial |
| 12 years | Duodecennial |
| 13 years | Tredecennial |
| 14 years | Quattuordecennial |
| 15 years | Quindecennial |
| 20 years | Vigintennial |
| 50 years | Semicentennial |
| 75 years | Dodranscentennial |
| 100 years | |
| 150 years | Sesquicentennial |
| 200 years | Bicentennial |
| 250 years | Sestercentennial |
| 300 years | Tercentennial |
| 400 years | Quadricentennial |
| 500 years | Quincentennial |
| 600 years | Sexcentennial |
| 700 years | Septcentennial |
| 800 years | Octocentennial |
| 900 years | Nonacentennial |
| 1000 years | |
| 2000 years | Bimillennial |
On Tuesday, October 19, 2010
On
| Common Name | Chemical Name | Chemical Formulae |
| Dry Ice | Solid Carbondioxide | CO2 |
| slaked Lime | Calcium Hydroxide | Ca (OH)2 |
| Bleaching Powder | Calcium Oxychloride | CaOCl2 |
| Nausadar | Ammonium Chloride | NH4Cl |
| Caustic Soda | Sodium Hydroxide | NaOH |
| Rock Salt | Sodium Chloride | NaCl |
| Caustic Potash | Potassium Hydroxide | KOH |
| Potash Alum | Potassium Aluminium Sulphate | K2SO4 Al2 (SO4)3.24H2O |
| Epsom | Magnesium Sulphate | MgSO4.7H2O |
| Quick Lime | Calcium Oxide | CaO |
| Plaster of Paris | Calcium Sulphate | (CaSO4) ½ H2O |
| Gypsum | Calcium Sulphate | (CaSO4) .2H2O |
| Green Vitriol | Ferrous Sulphate | FeSO4.7H2O |
| Mohr's Salt | Ammonium Ferrous Sulphate | FeSO4 (NH4)2 SO4.6H2O |
| Blue Vitriol | Copper Sulphate | CuSO4.5H2O |
| White Vitriol | Zinc Sulphate | ZnSO4.7H2O |
| Marsh Gas | Methane | CH4 |
| Vinegar | Acetic Acid | CH3COOH |
| Potash Ash | Potassium Carbonate | K2CO3 |
| Hypo | Sodium Thiosulphate | Na2S2O3.5H2O |
| Baking Powder | Sodium Bicarbonate | NaHCO3 |
| Washing Soda | Sodium Carbonate | Na2CO3.10H2O |
| Magnesia | Magnesium Oxide | MgO |
| Chalk (Marble) | Calcium Carbonate | CaCO3 |
| Lunar Caustic | Silver Nitrate | AgNO3 |
| Laughing Gas | Nitrous Oxide | N2O |
| Chloroform | Tricholoro Methane | CHCl3 |
| Vermelium | Mercuric Sulphide | HgS |
| Borax | Borax | Na2B4O7.10H2O |
| Alcohol | Ethyl Alcohol | C2H5OH |
| Sugar | Sucrose | C12H22O11 |
| Heavy Water | Duterium Oxide | D2O |
| Globar's Salt | Sodium Sulphate | Na2SO4.10H2O |
| T.N.T | Tri Nitrotoluene | C6H2CH3 (NO2)3 |
| Calomel | Mercurous Chloride | HgCl |
| Sand | Silicon Oxide | SiO2 |
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