Hi I'm Phil
and I'm going to tell you the difference between
'all together' and 'altogether'.
Yes, they sound the same, but they're not.
'All together' – that's two words and two 'L's –
means 'everything or everyone
being or doing something together
with everything or everyone else'.
Let's sing all together!
Or:
Put the vegetables in the bowl
and mix them all together.
'Altogether' – that's one word and one 'L' –
is an adverb and it means
'completely' or 'entirely'.
My brother has an altogether different personality to me.
He's nothing like me!
So if you have 'altogether' as one complete word,
it means 'completely' or 'entirely'.
And if we have 'all together' as two words together
then that means 'everything or everyone together'.