When I do vocab lessons for a word I’ve never heard before, or one which seems to be synonymous with other words I’ve learnt, I’ll look it up on Jisho.org to see if I can get a better understanding of usage/context. I also sometimes ask people usage differences on HelloTalk etc.
What other tools do you guys use to achieve this same goal? I’ve heard of some people using JP dictionaries and thesauruses, but I do not know what online ones are good.