Alright, there isn't a clear way of explaining this, but here's just a little something:
Endings that tell you it’s a masculine noun (most of the time): -ig, -ent, -ier, -ist, -or, -ör, -iker, -ast, -eur.
Endings that tell you it’s a feminine noun (usually!): - anz, -ik, -tät, -ur, -ei, -sis, -ive, -ade.
Endings that tell you it’s a neuter noun (most of the time): -tel, -in, -tum, -um, -ment, -o, -ma, -ett.
I hope those charts helped-
