Firstly, secondly, thirdly …
(a), (b), (c) …
(i), (ii), (iii) …
On the one hand …, on the other hand …
both …, and …
as well as …
not only …, but also …
… or, for that matter, …
Just as …, …
Comparison of …
compared with or to …
To give a comparison from …,
… has been compared or likened to …
… is or are often compared to or with …
… are broadly comparable
comparatively few
relatively speaking
It is interesting to compare …
For comparison, we also examined …
Comparison of … revealed that …
The results were compared with or to those obtained in or by …
a comparative study or investigation of …
Equal or equivalent
… equals …
… is equal to …
… is equivalent to …
to equate … with …
the terms … and … are used interchangeably
Equally, …
It is equally clear that …
in equilibrium
On balance, …
to strike a balance between … and …
in parallel
… parallels …
… is paralleled by …
a parallel process of …