Gender of nouns

Question 1

What is the rule for nouns that end in -ma

Answer 1

Nouns that end in -ma are usually masculine

Question 2

What are some exceptions to the rule for nouns ending in -ma

Answer 2

Nouns ending in -ma that are faminine instead of masculine are:
la cama - bed
la pluma - pen (old fashioned, feather)
la paloma - pigeon, dove

Question 3

What are the exceptions of masculine nouns that end in -a

Answer 3

el cura - priest,
el yoga,
el sofa - sofa
el cometa - comet (but la cometa= kite)
el mapa,
el planeta,
el dia,

el gorila (could be both masculine or femine)

Question 4

What are the exceptions of famine nouns that end in -o

Answer 4

la moto - motorcycle
la radio
la mano - hand
la foto