Firewood is the logs cut and stored for burning. Chop firewood, a stack of firewood, dry firewood.
Seasoning is the whole thing: wet wood spends its heat boiling off water, smokes badly and lines the chimney with tar, so a year or two under cover is the standard advice. Hardwoods burn longer and softwoods light faster. Note the compound of fire and wood.
1nounfirewoodLogs cut and stored for burning.
“We gathered firewood from the forest before it got dark.”
firewood is fuel.
Fire plus wood, a compound recorded in Middle English and unchanged in meaning since.
Middle English
ferwode
English, today
firewood
From Middle English ferwode, fyrewoode, equivalent to fire + wood.
Etymology from Wiktionary, CC BY-SA