LGBTQIA+ vs LGBTQ

LGBTQIA+ and LGBTQ both are nouns.

Word	Noun	Adjective	Verb	Adverb
LGBTQIA+	Yes	No	No	No
LGBTQ	Yes	No	No	No

As nouns, LGBTQIA+ and LGBTQ are synonyms defined as:

LGBTQIA+ and LGBTQ: 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 LGBTQIA+ include LGBT+, LGBT, LGBTQIA.

LGBTQIA+ (noun)	LGBTQ (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