- isocyanate
- isolability
- isolable
- isolatable
- isolate
- isolated
- isolation
- isologous
- isomer
- isomeric
- isomerism
- isomerization
- isomerize
- isomorphism
- isomorphous
- isotope
- isotopic
- isotopy
- kalium
- ketone
- l-asparaginase
- labile
- lability
- lactate
- laevodopa
- laevogyrate
- laevulose
- kurchatovium
- lachrymator
- lactic
- langbeineite
- lanthanide
- lanthanum
- lecithin
- leucine
- legumin
- levogyrate
- levulose
- ligroin
- linalool
- lipolysis
- lipoprotein
- lixiviate
- lipide
- lipin
- litharge
- lithic
- lithium
- lixiviation
- linoleic acid
- lipid
- litmus
- lox
- luciferin
- lunar
- lutecium
- lutein
- magilp
- magnesia
- magnesium
- lysine
- maganese
- mannite
- malic
- maltose
- maltase
- manganese
- manganiferous
- mannose
- menstrua
- meprobamate
- mercuric
- mesitylene
- megilp
- mendelevium
- menstruum
- menthol
- mercaptan
- methanol
- metathesis
- micelle
- methane
- methyl
- methylene
- micella
- mineral
- minium
- metamerism
- molar
- molybdenum
- monovalence
- monovalency
- monovalent
- mordant
- molarity
- molecule
- natrium
- neodymium
- neutralise
- neptunium