やなんか => Something like... N3
Vague
やなにか => the same, equivalent to N4
Demonstrate by example
あるいは~かもしれない => Or maybe... perhaps N4
Line up, list
ふしがある => Seem N2
Speculation
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
あとから => after~; later N3
Relationship before and after
~あたかも => just like N1
Similarity
やっと => Eventually... N4