I scraped the web for lists of nouns, verbs, adjectives, adverbs, and prepositions. Credit to the folks that put those lists together:

nouns:	from http://www.desiquintans.com/nounlist
verbs:	from https://www.worldclasslearning.com/english/five-verb-forms.html
adjectives:	from https://patternbasedwriting.com/elementary_writing_success/list-4800-adjectives/
adverbs:	from https://www.mobap.edu/wp-content/uploads/2013/01/list_of_adverbs.pdf
prepositions:	from https://en.wikipedia.org/wiki/List_of_English_prepositions