theory

As nouns the difference between theory and options

is that theory is mental conception; reflection, consideration while options is plural of lang=en.

As a verb options is

third-person singular of option.

As nouns the difference between theory and null

is that theory is (obsolete) mental conception; reflection, consideration while null is zero, nil; the cardinal number before einn.

As nouns the difference between theory and innovation

is that theory is mental conception; reflection, consideration while innovation is the act of innovating; the introduction of something new, in customs, rites, etc.

In mathematics|lang=en terms the difference between theory and rational

is that theory is (mathematics) a field of study attempting to exhaustively describe a particular class of constructs while rational is (mathematics) a rational number: a number that can be expressed as the quotient of two integers.

As nouns the difference between theory and rational

is that theory is (obsolete) mental conception; reflection, consideration while rational is (mathematics) a rational number: a number that can be expressed as the quotient of two integers.

As an adjective rational is

capable of reasoning.

As nouns the difference between theory and revelation

is that theory is (obsolete) mental conception; reflection, consideration while revelation is revelation.

In uncountable|lang=en terms the difference between theory and suggestion

is that theory is (uncountable) the underlying principles or methods of a given technical skill, art etc, as opposed to its practice while suggestion is (uncountable) the act of suggesting.

As nouns the difference between theory and suggestion

is that theory is (obsolete) mental conception; reflection, consideration while suggestion is (countable) something suggested (with subsequent adposition being for ).

As a noun theory

is (obsolete) mental conception; reflection, consideration.

As a verb rule is

.

In obsolete|lang=en terms the difference between theory and predict

is that theory is (obsolete) mental conception; reflection, consideration while predict is (obsolete) a prediction.

As nouns the difference between theory and predict

is that theory is (obsolete) mental conception; reflection, consideration while predict is (obsolete) a prediction.

As a verb predict is

to make a prediction: to forecast, foretell, or estimate a future event on the basis of knowledge and reasoning; to prophesy a future event on the basis of mystical knowledge or power.

As an adjective epistemological

is of or pertaining to epistemology or theory of knowledge, as a field of study.

As a noun theory is

(obsolete) mental conception; reflection, consideration.

As nouns the difference between theory and approaches

is that theory is (obsolete) mental conception; reflection, consideration while approaches is .

As a verb approaches is

(approach).