http://www.zhonghuayuwen.org/
I saw this website today. It is related to what I mentioned in the comment to the question:
Recently I saw a piece of news of a book being published later this year with a background of Mainland China and Taiwan cooperation, which can be used as a dictionary. – coolcfan yesterday
And now you don't need to wait to buy the book. The link above is the official site of the cooperation project and it provides an online version of the dictionary.
For example, when you search for 垃圾 on that site, it will give you the following result:
大陆规范字形 垃圾
台湾标准字体 垃圾
读音
汉语拼音:lājī
注音符号:ㄌㄚ ㄐㄧ
汉语拼音:lèsè
注音符号:ㄌㄜˋ ㄙㄜˋ
释义
1、废弃物的统称。[例]~山︱~车︱~堆。2、比喻没有意义或引起不良作用的人或事物。[例]~邮件︱清除社会~。
How to use this website:
For example, when you search for 印表机, you will see
and “见【打印机】” in the 释义
section. This means: 1. 印表机 is a Taiwan word; 2. 打印机 is a word with the same meaning.
And then when you click on the link on “见【打印机】”, you will see
on the page, which means this is a Mainland word. In the 释义
section you will see:
计算机的输出设备,可以把文字、图表等直接印在纸上。
即“印表机”;也作“列印机”。
So you will know that for printer, 打印机 is the Mainland word, and 印表机 or 列印机 is the Taiwan version.