поездов translation needed

[hangman21]

поездов
поезд
поездa


difference between the 3?? russian is another of those languages that get my confused, help would be appriciated :-)

[khurtsiya]

поезд - singular
поездa - plural
поездов - can't be used alone; that's from wordstat.ya.ru I think?
расписание поездов - train time-table

[hangman21]

thank you :)