ばこそ => Because of A N1
Reason, Result, Response
こそ~が => Although A is B N1
Contrast/Surprise
ゆえに => Because of A N1
Reason, Result, Response
そういえば => Speaking of .., A by the way, A; N2
Considering, Concerning
てこそ => Now since A... N2
Reason, Result, Response
そばから => As soon as A, B N1
Time, Situation
そこで => Considering the situation A, B N2
Considering, Concerning
こそすれ => B is definitely not so (strongly emphasized) N1
Contrast/Surprise
こそ => A (often a reason/cause) is very strongly emphasized. N3
Reason, Result, Response
こそあれ => Although A (A is some negative attribute) N1
Contrast/Surprise
ことは~が => Although A is true, C N3
Contrast
たことがある => Have done A before N4
Situations and Experiences