"carga útil" in English

loading capacity- payload- useful load

burden- cargo- charge- load- upload- burthen- chore- encumbrance- airfreight- blast- blitz- impedimenta- lading- lading- loading- refill- tax- cathexis- bearing load- download- freight- rush

to bear- to carry- to charge- to load- to attack- to encumber- to load up- to hump- to hump about- to pick up- to saddle- to take on- to upload- to top up- to annoy- to pester- to burden- to burthen- to lade- to cover- to mount- to fill- to fuel- to debit- to fail- to flunk- to have- to tease- to try to pick … up- to cart

helpful- handy- usefuluseful