Looks like no one added any tags here yet for you.
Alkane
Contains only C-C and C-H single bonds
Alleine
A C-C double bond
Alkyne
A C-C triple bond
Benzene/Arene
A 6 carbon ring with 3 pi bonds
Alcohol
An OH group Single bonded to C
Ether
An O attached to two C atoms
Epoxide
A 3-members ring containing one O and two C atoms
Amine
A N-atom single bonded to some combustion of three C and H bonds
Carbonyl
Oxygen double bonded to carbon
Aldehyde
Carbonyl flanked by C and H on either side
Ketone
Carbonyl flanked by two C atoms
Carboxylic acid
Carbonyl flanked by a C atom and OH
Ester
Carbonyl flanked by a C atom and OC