H

ham radio
ham radio operator

Harvard (aircraft/trainer)

harvest excursion

hay baler, see baler

haying
haying equipment

header (a type of equipment)

header (a fall)

heck
like heck, heck of a lot, raise heck, what the heck, who the heck

honest to gosh, see gosh

horse and buggy

horse and cutter

horse and machine days

horse and sleigh

horse and wagon

horse fork rope

house party
house party dance

hungry thirties

hydro
hydro dam, hydro guys, hydro truck