LGBTQ vs LGBT

LGBTQ and LGBT both are nouns.

Word	Noun	Adjective	Verb	Adverb
LGBTQ	Yes	No	No	No
LGBT	Yes	No	No	No

As nouns, LGBTQ and LGBT are synonyms defined as:

LGBTQ and LGBT: the community of people who have a non-normative gender and/or sexual identity, including lesbian, gay, bisexual, transgender, intersex, or asexual

Other synonyms of LGBTQ include LGBT+, LGBTQIA+, LGBTQIA.

LGBTQ (noun)	LGBT (noun)
the community of people who have a non-normative gender and/or sexual identity, including lesbian, gay, bisexual, transgender, intersex, or asexual	the community of people who have a non-normative gender and/or sexual identity, including lesbian, gay, bisexual, transgender, intersex, or asexual