Here are the types of birds you can call seabirds and feel good about yourself:

Order Procellariiforme

Family Diomedeidae - Albatrosses

Family Procellariidae - Petrels, Shearwaters

Family Hydrobatidae - Storm-Petrels

Order Pelecaniformes

Suborder Phaethontes

Family Phaethontidae - Tropicbirds

Suborder Pelecani

Family Sulidae - Boobies

Family Pelecanidae - Pelicans

Family Phalacrocoracidae - Cormorants

Family Fregitae - Frigatebirds

Order Charadriiformes

Suborder Lari

Family Laridae - Gulls, Terns, Noddies, Skimmers

Suborder Alcae

Family Alcidae - Murres, Auklets, Guillemots, Puffins

Order Gaviiformes - Loons

Order Podicipediformes - Grebes