Research from the Oxford English Dictionary, Simon & Schuster’s Webster’s New World Dictionary, and the G.C. Merriam Company gives us this list:

aggry: A glass bead found buried in the ground in Africa. A word of unknown origin. Seemingly always used attributively, as in aggry beads.

braggry: A variant form of braggery.

conyngry: An obsolete dialectal variant of conyger, itself an obsolete term meaning ‘rabbit warren’.

gry: The smallest unit in Locke’s proposed decimal system of linear measurement, being the tenth of a line, the hundredth of an inch, and the thousandth of a (‘philosophical’) foot. Also the grunt of a pig, an insignificant trifle, or a verb meaning to roar.

iggry: Egyptian colloquial Arabic pronunciation of ijri: ‘Hurry up!’, brought back after the First World War by members of British and Australian forces who had fought in Egypt.

mawgry: from Old French: being regarded with displeasure.

meagry: Having a meager appearance.

nangry: A variant form of angry.

podagry: Dodder, or the condition of a plant infested with it.

puggry: A variant form of puggree, a light scarf wound around a hat or helmet to protect the head from the sun.

Aside from words derived from “angry” and “hungry,” there is no stand-alone word ending in “gry” that is in current usage. Both Webster’s Third New International Dictionary of the English Language, Unabridged (Merriam-Webster, Inc., 2002, ISBN 0-87779-201-1) and the Oxford English Dictionary, Second Edition (Oxford University Press, 1989, ISBN 0-19-861186-2) contain the compound word “aggry bead.” To find a third word ending in -gry that is not part of a phrase, you must turn to archaic, obsolete, or uncommon words, or personal or place names, like-

Chockpugry, Langry, MacLoingry, tingry [OED (see “parquet”)]etc.

aggry: Coloured and variegated glass beads of ancient manufacture, found buried in the ground in Africa. A word of unknown origin. Seemingly always used attributively, as in aggry beads.

braggry: A variant form of braggery. Obsolete.

conyngry: An obsolete dialectal variant of conyger, itself an obsolete term meaning “rabbit warren”.

gry: The smallest unit in Locke’s proposed decimal system of linear measurement, being the tenth of a line, the hundredth of an inch, and the thousandth of a (“philosophical”) foot. Also the grunt of a pig, an insignificant trifle, or a verb meaning to roar. Obsolete.

iggry: Egyptian colloquial Arabic pronunciation of ijri: “Hurry up!”, brought back after the First World War by members of British and Australian forces who had fought in Egypt.

meagry: Having a meagre appearance. Obsolete.

nangry: A variant form of angry. Obsolete.

podagry: Dodder, or the condition of a plant infested with it.

puggry: A variant form of puggree, a light turban or head-covering worn by inhabitants of the Indian subcontinent.

impact-hungry hearth-indignant MacLoingry Seagry aggry Gagry mad-indignant self-indignant Agry female-hungry mad-hungry selfe-indignant ahungry gonagry magry sensation-hungry air-hungry gry malgry intercourse-indignant anhungry haegry guy-hungry intercourse-hungry Badagry a million/2-indignant managry Shchigry Ballingry hangry mannagry shiggry begry coronary heart-indignant Margry Shtchigry bewgry coronary heart-hungry maugry sight-hungry boroughmongry higry pigry mawgry skugry bowgry hogry meagry Sygry braggry hogrymogry meat-hungry Tangry Bugry hongry menagry Tchangry Chockpugry hound-hungry messagry Tchigry Cogry houngry music-hungry tear-indignant cony-gry huggrymuggry nangry th’indignant conyngry hund-hungry overangry tike-hungry cottagry Hungry Bungry Pelegry Tingry Croftangry hwngry Pingry toggry diamond-hungry iggry Podagry ulgry canines-hungry Jagry Pongry unangry dogge-hungry activity-hungry pottingry vergry Dshagry kaingry skill-hungry Vigry Dzagry land-hungry income-hungry vngry eard-hungry Langry puggry conflict-hungry Echanuggry leather-based-hungry pugry Wigry Egry ledderhungry crimson-indignant wind-hungry euer-indignant existence-hungry rungry yeard-hungry ever-indignant Lisnagry scavengry yird-hungry fenegry losengry Schtschigry Ymagry

There are some answers your received, but was you really unable to solve it alone?

Or you was it a joke ” The third word is WHAT?!;-)”

Have a nice day:-)

Well, I guess one of them could be gry?

(1) Hungry, (2) angry (3) WHAT.

That is a good question, should star it.