Yes, cod is a Scrabble word!

Adverb

1. Collecting the charges upon delivery

Verb

1. Fool or hoax

2. Harass with persistent criticism or carping

Adjective

1. Payable by the recipient on delivery

Noun

1. The vessel that contains the seeds of a plant (not the seeds themselves)

2. Lean white flesh of important North Atlantic food fish; usually baked or poached

3. Major food fish of Arctic and cold-temperate waters