90 entries under intense topic. ×

26
sincere(adjective, open, great, pleasant, keen)
21
earnest(adjective, strong, open, pleasant, keen)
15
unfeigned(adjective, open, keen, warm, honest)
13
devout(adjective, open, keen, warm, honest)
12
deep(adjective, feeling, strong, great, warm)
12
emotional(adjective, strong, keen, warm, difficult)
12
profound(adjective, feeling, great, warm)
11
fervent(adjective, strong, keen, warm, difficult)
11
wholehearted(adjective, strong, open, pleasant, keen)
10
hearty(adjective, great, pleasant, keen, friendly)
10
ardent(adjective, strong, keen, warm, difficult)
10
warm(adjective, strong, kind, pleasant, keen)
8
passionate(adjective, strong, keen, warm, total)
7
serious(adjective, open, keen, warm, honest)
6
fervid(adjective, strong, keen, difficult)
6
poignant(adjective, strong, difficult, violent)
6
zealous(adjective, strong, keen, warm, difficult)
5
deep-seated(adjective, great, natural, emotional)
5
extreme(great, involved, overwhelming)
5
keen(adjective, strong, great, passionate)
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APASmart Define. (2016). heartfelt thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/heartfelt/thesaurus/synonyms
ChicagoSmart Define. 2016. "heartfelt thesaurus" https://smartdefine.org/heartfelt/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2016, heartfelt thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/heartfelt/thesaurus/synonyms>.
MLASmart Define. "heartfelt thesaurus" 31 March 2016. Web. 28 September 2026. <https://smartdefine.org/heartfelt/thesaurus/synonyms>