Thanksgiving is not celebrated in Spanish-speaking countries except by some Americans, nevertheless here is some Spanish vocabulary related to the American holiday.

to baste – pringar
carving knife – el cuchillo de trinchar or trinchante
to carve the turkey – trinchar al pavo
corn on the cob – la mazorca de maíz
cranberry – el arándano
feast – un banquete
say grace – bendecir la mesa
grateful – (adj) agradecido/a
gravy – la salsa de carne
harvest – la cosecha
holiday – día de fiesta or feriado
leftovers – las sobras
mashed potatoes – el puré de patatas
parade – un desfile
Pilgrims – los peregrinos
pumpkin pie – el pastel/pay de calabaza
stuffing – el relleno
Thanksgiving – el Día de Acción de Gracias
to give thanks – dar las gracias
To gobble – gluglutear. Gluglú, gluglú is gobble, gobble
tradition – una tradición
turkey – el pavo
vegetables – las verduras or los vegetales
yam – Camote This word also means freaky or crazy in Costa Rica. Ñame is another word for yam

Tiquismo – chompipe means turkey here or a large cement mixer.