to begin with - firstly - first and foremost - first of all - first - at first - above all
secondly - the second thing is
undeniable - doubtless - one cannot deny
in addition - also - moreover - furthermore
thus - therefore
in conclusion - to sum up - to draw a conclusion - all in all - in summary
in any case - anyway - either way
luckily - fortunately
in fact - actually
meanwhile - neantime
as for - concerning
i think - i guess - i believe
amazing - incredible - unbelievable - improbable - fabulous - wonderful - fantastic - astonishing
extraordinary - unusual
Awful - terrible  
enormous - huge - gigantic
famous - well-known
incorrect - improper - unsuitable
though - although