1. a. - Noun
2. a. - Adjective
3. a. - Verb
4. a. - Adverb
5. a. - Preposition
6. a. - Conjunction
Abbreviation of abbreviation.
Abbreviation of acceleration (in feet per second).
Abbreviation of account.
Abbreviation of acre; acres; acreage.
Abbreviation of acronym.
Abbreviation of act; acting.
Abbreviation of activity.
Abbreviation of adjective.
Abbreviation of adjutant.
Abbreviation of adult.
Abbreviation of afternoon.
Abbreviation of age.
Abbreviation of altitude; altitude intercept.
Abbreviation of alto.
Abbreviation of amateur.
Abbreviation of ampere.
Abbreviation of annealing.
Abbreviation of answer.
Abbreviation of anthracite.
Abbreviation of apprentice.
Abbreviation of arc.
Abbreviation of are, ares.
Abbreviation of argent.
Abbreviation of assist; assists.
Abbreviation of atmosphere.
Abbreviation of attendance.
Abbreviation of audit; auditor.
Abbreviation of aunt.
Abbreviation of aviation; aviator.
Abbreviation of axis.
Abbreviation of absent.
Abbreviation of absolute.
Abbreviation of abundant.
Abbreviation of accepted.
Abbreviation of accidental.
Abbreviation of acting.
Abbreviation of active.
(linguistics, by extension) Abbreviation of transitive.
Abbreviation of aerial.
Abbreviation of annus (“a year”).
Abbreviation of anonymous.
Abbreviation of ante (“before”).
Abbreviation of anterior.
Abbreviation of automatic.
Abbreviation of available.
Abbreviation of anno (“in the year”).
Abbreviation of annually.
Abbreviation of about.
Abbreviation of at.
a.
Abbreviation of also.
absolute temperature
absorbance; absorbancy
academy; academician
acad
accommodation
accumulator
accusative case
acid
acre; acres
A; a.
address
adjutant
administration
admiral
adult
age; aged
air
air branch
aircraft; airplane
airman
alfa
alto
amateur
a.
ambassador
America; Americanization
Amer.
(biblical) Amos, the book of
amphibian
amplitude
ana; anna
Angstrom
Å
annus (a year)
anode
answer
ans.; ans; A
application
apprentice
April
aqua
arctic
army
article
artificer
Artillery
(military) assault, as on a badge
associate; association
Atlantic
atomic weight
attack
August
author
automobile
absent
Absolute
accepted
adjusted
American
amphibious
anterior
approved
arterial
Asian
asked
astragal
asymmetric
atomic
Australian
auxiliary
avancé (fast)
admit
Americanize
after
ante (before)
at
A.
annō (in the year)
Abbreviation of accommodation.
Abbreviation of anode.
Abbreviation of area.
Abbreviation of aqua.
Abbreviation of artery; arterial blood.
Source: en.wiktionary.org