Theory:

Homonyms are two or more words having the same spelling but different meanings and origins.
Example:
Present is a word that has the same spelling for two different meanings from two different origins. The meanings are:
  • present - now, currently
  • present - gift
Here the word "present" is pronounced the same, but different meanings from different origins.
now.jpg
Present: Now, currently.
 
present.png
Present: Gift.
Example:
No.
Word
Meaning 1
Meaning 2
1
MatchA contest in sports.Be equal in quality or strength.
2
RingA small circular band.A phone call.
3
RockThe solid mineral underlying the soil.Move gently to and fro.
4
LetterA character of the alphabet.A written communication.
5
SawA hand tool for cutting wood.Past tense of "see".
6
TripStumble and fall.A journey for pleasure.
7
Left
Relating to the side of a human body or
of a thing that is to the west when
facing north.
Past tense of "leave".
8
CanBe able to.A container.
9
NailA small metal spike.A covering in the tips of fingers.
Important!
For a detailed list of homonyms, click here.
Homonyms used in the chapter "Sir Isaac NewtonAn Ingenious Scientist":
 
No.
Words
Meaning 1 (used in the lesson)
Meaning 2 (other meaning)
1
Left
Past tense of "leave".
Relating to the side of a human body or of a thing that is to the west when facing north.
2
KindAffectionate, friendly.Sort, type of.
3
SawA hand tool for cutting wood.Past tense of "see".
4
Well
In a good or satisfactory way.
A source of water.
5
IssueThe action of flowing or coming out.An important topic or problem.
6
GroundFactors forming a basis for action, reason.Past tense of "grind".
7
MeansA method.Intend to convey or refer to; signify.
8
EvenUsed to emphasize something extreme.Flat and smooth.
9
HopperA container for a bulk material such as grain.A person or thing that hops.
10
LeaveGo away from.Holiday, absent from work.
11
LieBe situated in a specified position.An intentional false information.
12
StillEven now (used with comparatives for emphasis).Deep silence and calm.
13
MightPast tense of "may".Great and impressive power or strength.