1
engrossed(adjective, involved, absorbed, occupied, engaged)
1
entrenched
1
eternal
1
everlasting
1
extended
1
far
1
far left
1
final
1
funded
1
great
1
great bellied
1
hard-core
1
immersed(adjective, involved, absorbed, engaged, dreamy)
1
immortal
1
indissoluble
1
intent(adjective, thoughtful, involved, absorbed, engaged)
1
inveterate
1
lasting
1
lengthy
1
long
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APASmart Define. (2016). deep in thought thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/deep_in_thought/thesaurus/synonyms
ChicagoSmart Define. 2016. "deep in thought thesaurus" https://smartdefine.org/deep_in_thought/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, deep in thought thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/deep_in_thought/thesaurus/synonyms>.
MLASmart Define. "deep in thought thesaurus" 26 February 2016. Web. 24 September 2026. <https://smartdefine.org/deep_in_thought/thesaurus/synonyms>