This is the 3576th most frequent Swedish word.
fiske
Fishing.
Here 'fiske' is used to describe the activity of fishing.
Jag älskar fiske vid sjön.
I love fishing by the lake.
'fisket' refers to the quality or situation of fishing in general.
Fisket är bättre på våren än på hösten.
The fishing is better in the spring than in the fall.
Here 'fiske' is part of a compound noun 'fiskeutrustning' meaning 'fishing equipment'.