Open English Wordnet
Nouns
(n)firm, house, business firmthe members of a business organization that owns or operates one or more establishments“he worked for a brokerage house”
Verbs
Adjectives
(s)firm, steadfast, steady, stiff, unbendable, unfaltering, unshakable, unwaveringmarked by firm determination or resolution; not shakable“firm convictions”, “a firm mouth”, “steadfast resolve”, “a man of unbendable perseverance”, “unwavering loyalty”
(s)firm, loyal, truehearted, fastunwavering in devotion to friend or vow or cause“a firm ally”, “loyal supporters”, “the true-hearted soldier … of Tippecanoe” (Campaign song for William Henry Harrison), “fast friends”
Adverbs
(r)firm, firmly, steadfastly, unwaveringlywith resolute determination“we firmly believed it”, “you must stand firm”