LGBTQ vs LGBTQIA+

LGBTQ and LGBTQIA+ both are nouns.

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

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

LGBTQ and LGBTQIA+: 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+, LGBT, LGBTQIA.

LGBTQ (noun)	LGBTQIA+ (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