fast friend
Steadfast close ally
A fast friend is a close, loyal companion—someone bound to you by deep affection and trust.
Fast here preserves an older sense meaning firm or secure, as in held fast or stuck fast.
The phrase emphasizes enduring loyalty rather than speed: They've been fast friends since childhood.
Supportive partner
- confidantTrusted keeper of secrets
- chumFriend or fish scraps
- sidekickSubordinate adventure partner
- buddyInformal term for companion
pal · comrade · partner · bestie · BFF · mate · crony · familiar
Emotional closeness between people
- camaraderieGoodwill among companions
- kinshipState of being related
- affinityNatural liking or attraction
- rapportHarmonious mutual connection
connection · closeness · attachment · fellowship · solidarity · unity · harmony · accord
Worthy of trust
- reliableConsistently performing as expected
- honestFree from deception
- sincereGenuinely felt, not feigned
- genuineTruly what it claims
trustworthy · authentic · honorable · principled · forthright · truthful · transparent · solid
Consistently loyal and true
- devotedLoyally and lovingly attached
- trueAccurate or loyal
- unwaveringSteady and unchanging
- constantFixed, unvarying quantity
dedicated · staunch · unswerving · committed · resolute · unfaltering · allegiant · ride-or-die
ally
Supportive partner
buddy · pal · comrade · partner · bestie · BFF · mate · crony · familiar · bosom buddy
intimacy
Emotional closeness between people
- camaraderieGoodwill among companions
- kinshipState of being related
- affinityNatural liking or attraction
rapport · connection · closeness · attachment · fellowship · solidarity · unity · harmony · accord · sympathy
dependable
Worthy of trust
- reliableConsistently performing as expected
- honestFree from deception
- sincereGenuinely felt, not feigned
genuine · trustworthy · authentic · honorable · principled · forthright · truthful · transparent · solid · secure
faithful
Consistently loyal and true
- devotedLoyally and lovingly attached
- trueAccurate or loyal
- unwaveringSteady and unchanging
constant · dedicated · staunch · unswerving · committed · resolute · unfaltering · allegiant · ride-or-die · through thick and thin
fast friendcasual acquaintance
enemy · stranger · nodding acquaintance · foe · fair-weather friend
fast friendsworn enemy
Vowed lifelong adversary
bitter enemy · betrayer · backstabber · false friend · traitor
fast, friend, faster, fastest, fasten, fastener, fastening, fastness, steadfast