FIRM, FIRMLY, FIRMNESS
ADJECTIVES
..888 — FASTREDE firm in purpose, inflexible, steadfast → obs.
1297 — SICKER having a firm foundation or support; firm, unshaken → Sc. & N. Eng. dial.
1587 — CRIMP firm in structure, but yielding to pressure; brittle; crisp → obs.
1604 — SINEWED strong, firm, vigorous, powerful
1848 — RANK firm, strong
1851 — CRISP stiff, firm, as opposed to limp
1905 — NASH firm, stiff, hard → Eng. dial. (Bk.)
1952 — KRAGDADIG resolute, firm, vigorous → S. Afr.
ADVERBS
1175 — FASTLY firmly, unwaveringly, steadfastly; with confidence → obs. exc. Amer. dial.
1225 — HARDLY firmly → obs.
1450 — SICKER effectively, strongly, firmly → Sc. & N. Eng. dial.
1513 — AFFIRMLY firmly, strongly
1889 — HARD tightly, firmly, securely → Sc. & Eng. dial.
1965 — LIKE THE COW ATE THE CABBAGE with firm or harsh words, thoroughly → Amer. dial.
NOUNS
1834 — AN IRON HAND IN A VELVET GLOVE rigid firmness accompanied by courtesy, politeness, and gentleness
NOUNS – PERSON
1902 — JELLYFISH a person who lacks firmness of purpose → colloq.
Lexicophilia 