やなんか => Something like... N3
Vague
やなにか => the same, equivalent to N4
Demonstrate by example
や => ... or... N5
Line up, list
や否や => as soon as; the moment ~ N1
しかし => But, nevertheless N5
Change the subject of the story
や、やいなや => As soon as A, B N1
Time, Situation
や => and; or N5
やっと => Eventually... N4
もしかすると/もしかしたら~かもしれない => perhaps; maybe; perchance; by any chance ~ N3
しかしながら => however, nevertheless N2
Things do not match the prediction
もしかしたら…か => perhaps; maybe; perchance; by any chance ~ N4
Speculation
...し, ...し, ...から => and; and what's more ~ (emphasis) N4
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