2. expressing contrast & comparison

(Transition words for different purposes)
a. coordinators: but, yet, but still, but anyway
b. paired subordinators: neither...nor
c. subordinators: although, even though, though, while, whereas, despite, in despite of, regardless of
d. transitions: nevertheless, nonetheless, however, on the one hand, on the other hand, in contrast to, in contrast, on the contrary 
f. coordinators: 
g. paired subordinators: as...as / more...than / less...than
h. subordinators: as (like) / as if / as though 
i. transitions: In the same way, / Similarly, / In contrast, / Unlike X, ...  (reference: http://www.grammar-quizzes.com/9-10.html)

How to express opposing ideas: despite, although, nevertheless...
Learn English with Emma      2015年7月22日
quiz: http://www.engvid.com/how-to-express-...

although & even though
source: learnamericanenglish

though, although, even though, despite, in spite of
source: English Lessons with Adam      2013年1月23日
quiz: http://www.engvid.com/vocabulary-though/

EVEN: even though, even if, even when...
source: English Lessons with Adam      2013年12月2日
quiz: http://www.engvid.com/english-vocabul...

How To Use 'But' Correctly
source: Twominute English      2014年1月30日

Using the word 'though' (Can be a subordinating conjunction / Can be an adverb / Less formal than although, even though and however
source: BBC Learning English         2017年8月4日

How to use ALTHOUGH and THOUGH 
source: Your English Web          2018年3月27日