unit trust vs investment firm

unit trust and investment firm both are nouns.

Word	Noun	Adjective	Verb	Adverb
unit trust	Yes	No	No	No
investment firm	Yes	No	No	No

As nouns, investment firm is a hypernym of unit trust; that is, investment firm is a word with a broader meaning than unit trust:

unit trust: a regulated investment company consisting of professional managers who issue redeemable securities representing a portfolio of many different securities
investment firm: a financial institution that sells shares to individuals and invests in securities issued by other companies

Other hypernyms of unit trust include fund, investment company, investment trust.

unit trust (noun)	investment firm (noun)
a regulated investment company consisting of professional managers who issue redeemable securities representing a portfolio of many different securities	a financial institution that sells shares to individuals and invests in securities issued by other companies