stronger

As an adjective stronger

is (strong).

As a noun sport is

fun, pastime, sport.

As adjectives the difference between wider and stronger

is that wider is (wide) while stronger is (strong).

As adjectives the difference between stronger and mightier

is that stronger is (strong) while mightier is (mighty).

As an adjective stronger

is (strong).

As a noun dead is

tooth.

As adjectives the difference between louder and stronger

is that louder is (loud) while stronger is (strong).

As adjectives the difference between rival and stronger

is that rival is having the same pretensions or claims; standing in competition for superiority while stronger is (strong).

As a noun rival

is a competitor (person, team, company, etc) with the same goal as another, or striving to attain the same thing defeating a rival may be a primary or necessary goal of a competitor.

As a verb rival

is to oppose or compete with.

As adjectives the difference between egal and stronger

is that egal is (obsolete) equal; impartial while stronger is (strong).

As adjectives the difference between stronger and bigger

is that stronger is (strong) while bigger is (big).

As a verb bigger is

(nonstandard|rare) to make or become bigger.