hwælhuntoþ

From hwæl (“whale”) +‎ huntoþ (“hunting”).

hwælhuntoþ m

whaling
- Voyages of Ohthere and Wulfstan
  Hē fōr ðyder, tōēacan þǣs landes sċēawunge, forðæm horshwælum, forðæm hī habbað swyðe æþele bān on hyra tōþum: þā tēð hȳ brōhton sume þǣm [cyninge]; and hyra hȳd bið swīðe gōd tō sċiprāpum. Sē hwæl bið micle lǣssa þonne ōðre hwalas: ne bið ne lengra ðonne syfan elna lang; ac, on his āgnum lande, is sē betsta hwælhuntað: þā bēoð eahta and fēowertiges elna lange, and þa mǣstan, fiftiġes elna lange; þāra, hē sǣde, þǣt hē syxa sum ofslōge syxtiġ on twām dagum.
  He went thither, in addition to the surveying of that land, because of the walruses, because they have very excellent bones on their tusks: they brought some of the teeth to the king; and their hides are very good for use as cables. This whale is much smaller than other whales; it is no longer than seven ells; but the best whaling is found in its own land: the whales are forty-eight ells long, and the largest are fifty ells...
an instance of whaling, a whale hunt

Strong a-stem:

More information singular, plural ...

Old English