sun

As a noun heat is

(military) high explosive antitank: a munition using a high explosive shaped charge to breach armour.

As a proper noun tan

is the eighth heavenly stem.

As a verb sea is

to saw.

In intransitive terms the difference between rain and sun

is that rain is to fall in large quantities while sun is to be exposed to the sun.

In transitive terms the difference between rain and sun

is that rain is to issue (something) in large quantities while sun is to warm or dry in the sunshine.

As nouns the difference between rain and sun

is that rain is condensed water falling from a cloud while sun is a star, especially when seen as the centre of any single solar system.

As verbs the difference between rain and sun

is that rain is to have rain fall from the sky while sun is to expose to the warmth and radiation of the sun.

As a proper noun sun is

the star that the Earth revolves around and from which it receives light and warmth.

As an adjective rat is

.

In intransitive terms the difference between vapour and sun

is that vapour is to use insubstantial language; to boast or bluster while sun is to be exposed to the sun.

In transitive terms the difference between vapour and sun

is that vapour is to turn into vapour while sun is to warm or dry in the sunshine.

As a proper noun sun is

the star that the Earth revolves around and from which it receives light and warmth.

As a proper noun snow

is .

As a noun musket is

a species of firearm formerly carried by the infantry of an army it was originally fired by means of a match, or matchlock, for which several mechanical appliances (including the flintlock, and finally the percussion lock) were successively substituted this arm has been superseded by the rifle.

As a proper noun good is

.

As an initialism swim is

someone who isn't me; someone who isn't myself.