Some synonyms of liar are:
Cheat, con artist, deceiver, deluder, dissimulator, equivocator, fabler, fabricator, fabulist, falsewitness, falsifier, fibber, maligner, misleader,perjurer, phony, prevaricator, promoter, storyteller, trickster.
a or an
you can use or , otherwise, or rather than.
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Like
athletics
spectacular
hard
Forefather?
peter
demonstrate, employ, illuminate,
You can use: manage and succeed.
Lumber or timber.