High frequency parts of speech, as reported in Kolbjørn Heggstad Norsk Frekvensordbok and somewhat modified. In each group (by word-class) I have tried to list some of the most common (not necessarily useful for your purposes) words. I've put in a very rough English equivalent. For the words that have several forms, I've listed the forms and listed alternative forms with a slash. For example, nouns are listed with their article (gender), then the definite singular, indefinite plural, and definite plural. Adjectives and adverbs (listed together partially as a matter of convenience, partially because they overlap) show neuter forms (gammelt), plural and definited forms, and comparison forms. The verbs are listed with their present tense, past tense, and past participle forms. I have used an asterisk to mark verbs that are irregular in some way (for example the present tense is not formed by adding an -e to the infinitive. Lists of verbs, for example can be found in Norwegian Verbs pp. 137-148, and an online list is available at: http://frodo.bruderhof.com/norskklassen/verbs.htm(thanks to Pierre Thompson and Norskklassen).

nouns

en	dag	dagen, dager, dagene	day
en	del	delen, deler, delene	part, portion
et	folk	folket, folk, folkene	people, folk
en	forbindelse	forbindelsen, forbindelser, forbindelsene	connection
en	gang	gangen, ganger, gangene	time, occurrence
en	grunn	grunnen, grunner, grunnene	basis, ground
en / ei	krone	kronen / krona, kroner, kronene	crown, money
et	land	landet, land, landene	land, country
en	mann	mannen, menn, mennene	man, husband
et	menneske	mennesket, mennesker, menneskene	human being
et	ord	ordet, ord, ordene / orda	word
en	sak	saken, saker, sakene	case, thing
et	spørsmål	spørsmålet, spørsmål, spørsmålene	question
en	tid	tiden / tida, tider, tidene	time, epoch
et	år	året, år, åra /årene	year

adjectives and adverbs

først	første	first
gammel	gammelt, gamle, eldre, eldst, eldste	old, older, oldest
ganske		quite
god	godt, gode, bedre, best, beste	good, better, best
hel	helt, hele	whole, full, fully
mulig	mulige, muligvis	possible, possibly
mye	meget, mer / mere, mest, meste	much, more, most
norsk	norske	Norwegian
ny	nytt, nye, nyere, nyest, nyeste	new, newer, newest
sikker	sikker, sikkert, sikre,	sure, certainly
sist	siste	last
stor	stort, store, større, størst, største	big, bigger, biggest
tidlig	tidlige, tidligere, tidligst, tidligste	early, previous

verbs

bli	blir, ble, blitt	become
burde	bør, burde	ought to
finne	finner, fant, funnet	find
få	får, fikk, fått	get, receive, may
gi	gir, ga / gav gitt	give
gjelde	gjelder, gjalt	be valid, relevant
gjøre	*gjør, gjorde, gjort	do, make
gå	går, gikk, gått	go, walk
ha	har, hadde, hatt	have
komme	kommer, kom, kommet	come
kunne	*kan, kunnet	able to
la	lar, lot, latt	let
ligge	ligger, lå, ligget	lie
måtte	*må, måttet	must, need to
se	ser, så, sett	see
si	*sier, sa, sagt	say
sitte	sitter, satt, sittet	sit
skulle	*skal, skullet	shall, should
stå	står, sto(d), stått	stand
ta	tar, tok, tatt	take
ville	*vil, villet	want to
være	*er, var, vært	be