Synonyms for Ingestion:

n.

mouth, gulp. ingestion (noun)
intake, uptake, consumption.
meal (noun)
feast, barbecue, bread, foodstuff, banquet, picnic, grub, eating, morsel, food, board, dinner, consumption, snack, lunch, meat, fare, meal, repast, spread, cuisine, feed, sustenance, taste, drink, nutriment, breakfast.
reception (noun)
osmosis, suction, reception, inspiration, absorption, assimilation, engorgement, admission, inhalation.
swallow (noun)
gulp, drink.

Other synonyms:

gulp. Other relevant words:
intake, gulp, absorption, uptake, mouth.