As nouns the difference between firms and markets
is that firms is plural of lang=en while markets is plural of lang=en.
As verbs the difference between firms and markets
is that firms is third-person singular of firm while markets is third-person singular of market.
firms
English
Noun
(head)
(obsolete, architecture) The principal rafters of a roof, especially a pair of rafters taken together.
Verb
(head)
(firm)
markets
English
Noun
(head)
Verb
(head)
(market)