fun and funny

Fun is normally an uncountable noun. It can be used after be to say that things or people are enjoyable or entertaining.

• The party was fun, wasn’t it? (not The party was funny.)
• Anne and Sam are a lot of fun.

In informal English, fun can also be used as an adjective before a noun.

• That was a really fun party.

Funny is an adjective, and is used to say that something makes you laugh.

• Why are you wearing that funny hat?

Note that funny has another meaning: ‘strange’, ‘peculiar’.

• ‘A funny thing happened.’ ‘Do you mean funny ha-ha or funny peculiar?’